CMake Nightly Date Stamp
Merge topic 'ninja-phony-rules-only-in-build-tree'

de8e534b Ninja: Limit custom command side-effects to build folder
Merge topic 'doc-drop-dart'

b8aa0cdf Help: Replace 'Dart' with 'CDash' in ctest.1 manual
Merge topic 'FindThreads_overhaul'

b7e5c5a2 FindThreads: introduce THREADS_PREFER_PTHREAD_FLAG (#14767)
bcb0e387 FindThreads: introduce an imported target to link to
46368edd FindThreads: move checking of the -pthread compiler flag into a macro
Merge branch 'master' into next