Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

cc1-return-codes.c
// cc1 immediate arguments (arguments which displays information and exits)
// shall exit indicating success (return code 0)
// RUN: %clang_cc1 -help
// RUN: %clang_cc1 -version