Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

as-version.s
// Test version information.

// UNSUPPORTED: -zos
// RUN: %clang -Wa,--version -c -fintegrated-as %s -o /dev/null \
// RUN:   | FileCheck --check-prefix=IAS %s
// IAS: clang version