Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

flags.test
; RUN: llvm-rc -no-preprocess /dry-run /FO %t -- %p/Inputs/empty.rc 2>&1 | FileCheck %s --allow-empty --check-prefix=FO
; RUN: llvm-rc -no-preprocess /dry-run /FO%t -- %p/Inputs/empty.rc 2>&1 | FileCheck %s --allow-empty --check-prefix=FO

; FO-NOT: Exactly one input file should be provided.