til_args: introduce --print-module-contexts

Some rudimentary instrumentation for monitoring the active module
contexts alongside the pipes

You probably want to redirect stderr to a file when using
--print-pipes and/or --print-module-contexts...

e.g.
```
rototiller --defaults --go --print-pipes --print-module-contexts 2>/dev/null
```

or, if you still want to monitor FPS or log_channels=on in rtv,
2>/file/to/tail then tail -F /file/to/tail in another terminal.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/til_args.h b/src/til_args.h
index 85d4d7b..7c21668 100644
--- a/src/til_args.h
+++ b/src/til_args.h
@@ -11,6 +11,7 @@ typedef struct til_args_t {
 	unsigned	use_defaults:1;
 	unsigned	help:1;
 	unsigned	gogogo:1;
+	unsigned	print_module_contexts:1;
 	unsigned	print_pipes:1;
 } til_args_t;