Allow the CTAGS to be set to something other than "gtags" or "ctags", but assume it supports a ctags(1)-compatible syntax.
Allow the CTAGS to be set to something other than "gtags" or "ctags",
but assume it supports a ctags(1)-compatible syntax.

PR:		46676
Submitted by:	Lyndon Nerenberg
MFC after:	3 days

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