Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

version.c
// RUN: %clang --version 2>&1 | FileCheck %s

CHECK: clang version

// Don't add llvm::TargetRegistry::printRegisteredTargetsForVersion()
// to --version output, see D79210 and D33900.
CHECK-NOT: Registered Targets: