Merge remote-tracking branch 'origin/releases/gcc-11' into devel/omp/gcc-11

Merge up to r11-9188-g2563fba71d0b67cb69b2cd2da649a50a70f2a02f (Oct 27, 2021)

diff --cc gcc/cp/decl.c
Simple merge

diff --cc gcc/cp/name-lookup.c
Simple merge

diff --cc gcc/cp/parser.c
Simple merge

diff --cc gcc/doc/invoke.texi
Simple merge