Merge r1838684, r1920570, r1920571, r1920572 from trunk #1164

Job	Run time
Empty APLOGNO() test	25s
Default	3m 37s
All-static modules	3m 33s
Prefork MPM, all-modules (except cgid)	4m 29s
Worker MPM, all-modules	3m 56s
Shared MPMs, all-modules	4m 26s
Event MPM, all-modules, mod_cgid fdpassing	3m 58s
Event MPM, all-modules, mod_cgid w/o fdpassing	3m 55s
Default, all-modules + install	4m 13s
Default, all-modules, random test order	4m 0s
GCC 10 maintainer-mode w/-Werror, install + VPATH	2m 59s
All-modules, APR 1.7.4, APR-util 1.6.3	4m 14s
APR 1.8.x, APR-util 1.7.x	5m 47s
Pool-debug	5m 44s
Shared MPMs (event), pool-debug, SSL/TLS variants	7m 53s
Shared MPMs (worker), pool-debug, SSL/TLS variants	7m 50s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	9m 27s
litmus WebDAV tests	2m 31s
APR 1.7.4, APR-util 1.6.3, LDAP	4m 8s
APR 1.7.x, APR-util 1.7.x, LDAP	5m 28s
APR trunk thread debugging	4m 1s
ASan	6m 22s
ASan, pool-debug	6m 54s
HTTP/2 test suite	6m 20s
	1h 56m 10s

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