Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

libtool-response-file.test
RUN: llvm-nm --help | FileCheck %s
Check that the output of llvm-nm --help contains the literal text @FILE; this
indicates to libtool that llvm-nm does support response files.
CHECK: @FILE