Linux

event: avoid possible hang in clean_child_exit #763

Job	Run time
Empty APLOGNO() test	30s
Default	3m 22s
All-static modules	3m 39s
Prefork MPM, all-modules (except cgid)	3m 56s
Worker MPM, all-modules	3m 56s
Shared MPMs, all-modules	3m 58s
Event MPM, all-modules, mod_cgid only	3m 51s
Event MPM, all-modules, no CMSG_DATA	3m 52s
Default, all-modules + install	4m 26s
Default, all-modules, random test order	3m 53s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 14s
All-modules, APR 1.7.4, APR-util 1.6.3	3m 53s
APR 1.8.x, APR-util 1.7.x	5m 35s
Pool-debug	5m 52s
Shared MPMs (event), pool-debug, SSL/TLS variants	8m 31s
Shared MPMs (worker), pool-debug, SSL/TLS variants	9m 16s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	8m 58s
litmus WebDAV tests	2m 10s
litmus WebDAV tests, APR trunk, LMDB	2m 9s
Regenerate ap_expr	3m 53s
APR 1.7.4, APR-util 1.6.3, LDAP	3m 49s
APR trunk thread debugging	3m 54s
UBSan	4m 59s
ASan	6m 33s
ASan, pool-debug	7m 0s
HTTP/2 test suite	11m 21s
MOD_TLS test suite	2m 42s
Configured w/reduced exports	1m 59s
OpenSSL 3.1	3m 31s
OpenSSL 3.2 -Werror	3m 59s
OpenSSL 3.2 no-engine	3m 28s
	2h 22m 9s

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