Merge of 1912415 from trunk: #518

Job	Run time
Empty APLOGNO() test	53s
Default	4m 17s
All-static modules	4m 3s
Prefork MPM, all-modules (except cgid)	5m 27s
Worker MPM, all-modules	4m 54s
Shared MPMs, all-modules	5m 58s
Event MPM, all-modules, mod_cgid only	6m 16s
Event MPM, all-modules, no CMSG_DATA	4m 40s
Default, all-modules + install	5m 10s
Default, all-modules, random test order	4m 54s
GCC 10 maintainer-mode w/-Werror, install + VPATH	4m 56s
All-modules, APR 1.7.4, APR-util 1.6.3	38s
APR 1.8.x, APR-util 1.7.x	6m 53s
Pool-debug	9m 24s
Shared MPMs (event), pool-debug, SSL/TLS variants	10m 3s
Shared MPMs (worker), pool-debug, SSL/TLS variants	12m 55s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	11m 3s
litmus WebDAV tests	2m 37s
APR 1.7.4, APR-util 1.6.3, LDAP	1m 18s
APR trunk thread debugging	7m 3s
ASan	9m 27s
ASan, pool-debug	8m 45s
HTTP/2 test suite	17m 40s
MOD_TLS test suite	7m 48s
	2h 37m 2s

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