Merge r1838684, r1920570, r1920571, r1920572 from trunk #1163

Job	Run time
Empty APLOGNO() test	35s
Default	3m 28s
All-static modules	3m 26s
Prefork MPM, all-modules (except cgid)	4m 54s
Worker MPM, all-modules	3m 54s
Shared MPMs, all-modules	4m 20s
Event MPM, all-modules, mod_cgid fdpassing	4m 1s
Event MPM, all-modules, mod_cgid w/o fdpassing	3m 55s
Default, all-modules + install	4m 4s
Default, all-modules, random test order	4m 13s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 1s
All-modules, APR 1.7.4, APR-util 1.6.3	3m 59s
APR 1.8.x, APR-util 1.7.x	5m 49s
Pool-debug	6m 7s
Shared MPMs (event), pool-debug, SSL/TLS variants	8m 32s
Shared MPMs (worker), pool-debug, SSL/TLS variants	7m 49s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	8m 51s
litmus WebDAV tests	2m 8s
APR 1.7.4, APR-util 1.6.3, LDAP	3m 50s
APR 1.7.x, APR-util 1.7.x, LDAP	5m 34s
APR trunk thread debugging	3m 55s
ASan	6m 42s
ASan, pool-debug	6m 50s
HTTP/2 test suite	4m 57s
	1h 54m 54s

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