patch 8.1.1210: support for user commands is spread out
Problem: Support for user commands is spread out. No good reason to make
user commands optional.
Solution: Move user command support to usercmd.c. Always enable the
user_commands feature.
diff --git a/src/proto.h b/src/proto.h
index 448233a..e34af85 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -227,6 +227,7 @@
# endif
# include "ui.pro"
# include "undo.pro"
+# include "usercmd.pro"
# include "userfunc.pro"
# include "version.pro"
# include "window.pro"