mod_ssl: Add support for loading keys from OpenSSL 3.x providers via #634

Job	Run time
Empty APLOGNO() test	36s
Default	3m 34s
All-static modules	3m 42s
Prefork MPM, all-modules (except cgid)	3m 59s
Worker MPM, all-modules	3m 52s
Shared MPMs, all-modules	4m 1s
Event MPM, all-modules, mod_cgid only	4m 4s
Event MPM, all-modules, no CMSG_DATA	4m 9s
Default, all-modules + install	4m 6s
Default, all-modules, random test order	3m 57s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 13s
All-modules, APR 1.7.4, APR-util 1.6.3	5m 48s
APR 1.8.x, APR-util 1.7.x	5m 51s
Pool-debug	6m 6s
Shared MPMs (event), pool-debug, SSL/TLS variants	12m 45s
Shared MPMs (worker), pool-debug, SSL/TLS variants	11m 56s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	12m 29s
litmus WebDAV tests	2m 1s
litmus WebDAV tests, APR trunk, LMDB	2m 31s
Regenerate ap_expr	3m 49s
APR 1.7.4, APR-util 1.6.3, LDAP	6m 11s
APR trunk thread debugging	4m 34s
UBSan	5m 29s
ASan	6m 21s
ASan, pool-debug	6m 48s
HTTP/2 test suite	12m 1s
MOD_TLS test suite	5m 8s
	2h 29m 1s

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