Linux

Implement [ap_]atomics for [u]int/[u]long/size_t and use them for (some) proxy_worker_shared fields #624

Job	Run time
Empty APLOGNO() test	34s
Default	3m 44s
All-static modules	3m 29s
Prefork MPM, all-modules (except cgid)	4m 1s
Worker MPM, all-modules	3m 57s
Shared MPMs, all-modules	4m 3s
Event MPM, all-modules, mod_cgid only	3m 49s
Event MPM, all-modules, no CMSG_DATA	3m 55s
Default, all-modules + install	4m 32s
Default, all-modules, random test order	4m 24s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 19s
All-modules, APR 1.7.4, APR-util 1.6.3	5m 46s
APR 1.8.x, APR-util 1.7.x	5m 29s
Pool-debug	5m 54s
Shared MPMs (event), pool-debug, SSL/TLS variants	9m 10s
Shared MPMs (worker), pool-debug, SSL/TLS variants	9m 20s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	9m 15s
litmus WebDAV tests	2m 6s
litmus WebDAV tests, APR trunk, LMDB	2m 2s
Regenerate ap_expr	3m 49s
APR 1.7.4, APR-util 1.6.3, LDAP	5m 21s
APR trunk thread debugging	4m 37s
UBSan	4m 35s
ASan	6m 34s
ASan, pool-debug	7m 25s
HTTP/2 test suite	11m 48s
MOD_TLS test suite	5m 3s
	2h 18m 1s

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