merge 8.7 #4710

Job	Run time
gcc	11m 20s
gcc (CFLAGS=-DTCL_NO_DEPRECATED=1)	11m 28s
gcc (--disable-shared)	11m 33s
gcc (--disable-zipfs)	11m 11s
gcc (--enable-symbols)	11m 38s
gcc (--enable-symbols=mem)	13m 5s
gcc (--enable-symbols=all)	14m 45s
msvc	10m 47s
msvc (CHECKS=nodep)	10m 35s
msvc (OPTS=static)	10m 46s
msvc (OPTS=noembed)	10m 13s
msvc (OPTS=symbols)	11m 1s
msvc (OPTS=symbols STATS=compdbg,memdbg)	15m 2s
	2h 33m 24s

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