Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

rewrite-includes8.h
#if __has_include_next(<rewrite-includes8.h>)
#elif __has_include(<rewrite-includes8.hfail>)
#endif
#if !__has_include("rewrite-includes8.h")
#endif