Linux

WIP: add locking to mod_dav_fs to work around apr_dbm() locking issue #618

Job	Run time
Empty APLOGNO() test	24s
Default	3m 27s
All-static modules	3m 24s
Prefork MPM, all-modules (except cgid)	3m 54s
Worker MPM, all-modules	4m 12s
Shared MPMs, all-modules	4m 1s
Event MPM, all-modules, mod_cgid only	3m 51s
Event MPM, all-modules, no CMSG_DATA	4m 0s
Default, all-modules + install	4m 12s
Default, all-modules, random test order	4m 10s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 15s
All-modules, APR 1.7.4, APR-util 1.6.3	5m 34s
APR 1.8.x, APR-util 1.7.x	5m 42s
Pool-debug	6m 0s
Shared MPMs (event), pool-debug, SSL/TLS variants	8m 57s
Shared MPMs (worker), pool-debug, SSL/TLS variants	8m 52s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	9m 22s
litmus WebDAV tests	2m 1s
litmus WebDAV tests, APR trunk, LMDB	2m 2s
Regenerate ap_expr	3m 51s
APR 1.7.4, APR-util 1.6.3, LDAP	5m 43s
APR trunk thread debugging	4m 14s
UBSan	4m 46s
ASan	6m 28s
ASan, pool-debug	6m 41s
HTTP/2 test suite	11m 42s
MOD_TLS test suite	4m 54s
	2h 15m 39s

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