*: drop til_module_t.license

Originally the thinking was that rototiller modules would become
dlopen()ed shared objects, and that it would make sense to let
them be licensed differently.

At this time only some modules I have written were gplv3, Phil's
modules are all gplv2, and I'm not inclined to pivot towards a
dlopen model.

So this commit drops the license field from til_module_t,
relicenses my v3 code to v2, and adds a gplv2 LICENSE file to the
source root dir.  As of now rototiller+libtil and all its modules
are simply gplv2, and anything linking in libtil must use a gplv2
compatible license - the expectation is that you just use gplv2.

17 files changed, 7 insertions, 25 deletions

diff --git a/src/modules/drizzle/drizzle.c b/src/modules/drizzle/drizzle.c
index b634a5e..26d1ac8 100644
--- a/src/modules/drizzle/drizzle.c
+++ b/src/modules/drizzle/drizzle.c
@@ -2,7 +2,7 @@
  *  Copyright (C) 2020 - Vito Caputo - <vcaputo@pengaru.com>
  *
  *  This program is free software: you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 3 as published
+ *  under the terms of the GNU General Public License version 2 as published
  *  by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
@@ -194,6 +194,5 @@ til_module_t	drizzle_module = {
 	.name = "drizzle",
 	.description = "Classic 2D rain effect (threaded (poorly))",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv3",
 	.setup = drizzle_setup,
 };
diff --git a/src/modules/flui2d/flui2d.c b/src/modules/flui2d/flui2d.c
index ff0b6a4..8536d90 100644
--- a/src/modules/flui2d/flui2d.c
+++ b/src/modules/flui2d/flui2d.c
@@ -375,6 +375,5 @@ til_module_t	flui2d_module = {
 	.name = "flui2d",
 	.description = "Fluid dynamics simulation in 2D (threaded (poorly))",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "Unknown",
 	.setup = flui2d_setup,
 };
diff --git a/src/modules/julia/julia.c b/src/modules/julia/julia.c
index 5e7a350..f00c44c 100644
--- a/src/modules/julia/julia.c
+++ b/src/modules/julia/julia.c
@@ -168,5 +168,4 @@ til_module_t	julia_module = {
 	.name = "julia",
 	.description = "Julia set fractal morpher (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/meta2d/meta2d.c b/src/modules/meta2d/meta2d.c
index 18af219..c1b2a8a 100644
--- a/src/modules/meta2d/meta2d.c
+++ b/src/modules/meta2d/meta2d.c
@@ -2,7 +2,7 @@
  *  Copyright (C) 2019 - Vito Caputo - <vcaputo@pengaru.com>
  *
  *  This program is free software: you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 3 as published
+ *  under the terms of the GNU General Public License version 2 as published
  *  by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
@@ -232,5 +232,4 @@ til_module_t	meta2d_module = {
 	.name = "meta2d",
 	.description = "Classic 2D metaballs (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv3",
 };
diff --git a/src/modules/pixbounce/pixbounce.c b/src/modules/pixbounce/pixbounce.c
index ff397be..3efa797 100644
--- a/src/modules/pixbounce/pixbounce.c
+++ b/src/modules/pixbounce/pixbounce.c
@@ -199,5 +199,4 @@ til_module_t	pixbounce_module = {
 	.name = "pixbounce",
 	.description = "Pixmap bounce",
 	.author = "Philip J Freeman <elektron@halo.nu>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/plasma/plasma.c b/src/modules/plasma/plasma.c
index b970205..7598fe3 100644
--- a/src/modules/plasma/plasma.c
+++ b/src/modules/plasma/plasma.c
@@ -169,5 +169,4 @@ til_module_t	plasma_module = {
 	.name = "plasma",
 	.description = "Oldskool plasma effect (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/plato/plato.c b/src/modules/plato/plato.c
index d5c1357..05d80cb 100644
--- a/src/modules/plato/plato.c
+++ b/src/modules/plato/plato.c
@@ -2,7 +2,7 @@
  *  Copyright (C) 2020 - Vito Caputo - <vcaputo@pengaru.com>
  *
  *  This program is free software: you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 3 as published
+ *  under the terms of the GNU General Public License version 2 as published
  *  by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
@@ -674,5 +674,4 @@ til_module_t	plato_module = {
 	.name = "plato",
 	.description = "Platonic solids rendered in 3D",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv3",
 };
diff --git a/src/modules/ray/ray.c b/src/modules/ray/ray.c
index 07e1f99..06b0180 100644
--- a/src/modules/ray/ray.c
+++ b/src/modules/ray/ray.c
@@ -206,5 +206,4 @@ til_module_t	ray_module = {
 	.name = "ray",
 	.description = "Ray tracer (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/roto/roto.c b/src/modules/roto/roto.c
index 0ccb1e2..7aff770 100644
--- a/src/modules/roto/roto.c
+++ b/src/modules/roto/roto.c
@@ -256,5 +256,4 @@ til_module_t	roto_module = {
 	.name = "roto",
 	.description = "Anti-aliased tiled texture rotation (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/rtv/rtv.c b/src/modules/rtv/rtv.c
index 91da0a5..b166b15 100644
--- a/src/modules/rtv/rtv.c
+++ b/src/modules/rtv/rtv.c
@@ -184,13 +184,11 @@ static void setup_next_channel(rtv_context_t *ctxt, unsigned ticks)
 			txt_t	*caption;
 
 			settings = randomize_module_setup(ctxt->channel->module);
-			caption = txt_newf("Title: %s%s%s\nDescription: %s%s%s%s%s",
+			caption = txt_newf("Title: %s%s%s\nDescription: %s%s%s",
 						 ctxt->channel->module->name,
 						 ctxt->channel->module->author ? "\nAuthor: " : "",
 						 ctxt->channel->module->author ? : "",
 						 ctxt->channel->module->description,
-						 ctxt->channel->module->license ? "\nLicense: " : "",
-						 ctxt->channel->module->license ? : "",
 						 settings ? "\nSettings: " : "",
 						 settings ? settings : "");
 
diff --git a/src/modules/snow/snow.c b/src/modules/snow/snow.c
index 5c753b9..cffc10c 100644
--- a/src/modules/snow/snow.c
+++ b/src/modules/snow/snow.c
@@ -84,5 +84,4 @@ til_module_t	snow_module = {
 	.name = "snow",
 	.description = "TV snow / white noise (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/sparkler/sparkler.c b/src/modules/sparkler/sparkler.c
index 6a4b604..ca9bfaf 100644
--- a/src/modules/sparkler/sparkler.c
+++ b/src/modules/sparkler/sparkler.c
@@ -206,5 +206,4 @@ til_module_t	sparkler_module = {
 	.name = "sparkler",
 	.description = "Particle system with spatial interactions (threaded (poorly))",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/spiro/spiro.c b/src/modules/spiro/spiro.c
index ca3086f..7f31ddb 100644
--- a/src/modules/spiro/spiro.c
+++ b/src/modules/spiro/spiro.c
@@ -152,5 +152,4 @@ til_module_t	spiro_module = {
 	.name = "spiro",
 	.description = "Spirograph emulator",
 	.author = "Philip J Freeman <elektron@halo.nu>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/stars/stars.c b/src/modules/stars/stars.c
index c762043..1fb73ec 100644
--- a/src/modules/stars/stars.c
+++ b/src/modules/stars/stars.c
@@ -243,5 +243,4 @@ til_module_t	stars_module = {
 	.name = "stars",
 	.description = "Basic starfield",
 	.author = "Philip J Freeman <elektron@halo.nu>",
-	.license = "GPLv2",
 };
diff --git a/src/modules/submit/submit.c b/src/modules/submit/submit.c
index d643a2c..5dd5cb3 100644
--- a/src/modules/submit/submit.c
+++ b/src/modules/submit/submit.c
@@ -2,7 +2,7 @@
  *  Copyright (C) 2018 - Vito Caputo - <vcaputo@pengaru.com>
  *
  *  This program is free software: you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 3 as published
+ *  under the terms of the GNU General Public License version 2 as published
  *  by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
@@ -364,6 +364,5 @@ til_module_t	submit_module = {
 	.name = "submit",
 	.description = "Cellular automata conquest game sim (threaded (poorly))",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv3",
 	.setup = submit_setup,
 };
diff --git a/src/modules/swab/swab.c b/src/modules/swab/swab.c
index 44b9f21..fee20cf 100644
--- a/src/modules/swab/swab.c
+++ b/src/modules/swab/swab.c
@@ -2,7 +2,7 @@
  *  Copyright (C) 2019 - Vito Caputo - <vcaputo@pengaru.com>
  *
  *  This program is free software: you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 3 as published
+ *  under the terms of the GNU General Public License version 2 as published
  *  by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
@@ -148,5 +148,4 @@ til_module_t	swab_module = {
 	.name = "swab",
 	.description = "Colorful perlin-noise visualization (threaded)",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv3",
 };
diff --git a/src/modules/swarm/swarm.c b/src/modules/swarm/swarm.c
index 0b320fb..c64ef8e 100644
--- a/src/modules/swarm/swarm.c
+++ b/src/modules/swarm/swarm.c
@@ -2,7 +2,7 @@
  *  Copyright (C) 2021 - Vito Caputo - <vcaputo@pengaru.com>
  *
  *  This program is free software: you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 3 as published
+ *  under the terms of the GNU General Public License version 2 as published
  *  by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
@@ -274,5 +274,4 @@ til_module_t	swarm_module = {
 	.name = "swarm",
 	.description = "\"Boids\"-inspired particle swarm in 3D",
 	.author = "Vito Caputo <vcaputo@pengaru.com>",
-	.license = "GPLv3",
 };