* modules/ssl/ssl_engine_pphrase.c (modssl_load_engine_keypair): Fix #641

Job	Run time
Empty APLOGNO() test	33s
Default	3m 25s
All-static modules	3m 39s
Prefork MPM, all-modules (except cgid)	4m 13s
Worker MPM, all-modules	4m 9s
Shared MPMs, all-modules	4m 3s
Event MPM, all-modules, mod_cgid only	3m 55s
Event MPM, all-modules, no CMSG_DATA	3m 49s
Default, all-modules + install	4m 16s
Default, all-modules, random test order	4m 4s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 4s
All-modules, APR 1.7.4, APR-util 1.6.3	6m 0s
APR 1.8.x, APR-util 1.7.x	5m 46s
Pool-debug	6m 13s
Shared MPMs (event), pool-debug, SSL/TLS variants	9m 12s
Shared MPMs (worker), pool-debug, SSL/TLS variants	9m 16s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	10m 1s
litmus WebDAV tests	2m 22s
litmus WebDAV tests, APR trunk, LMDB	2m 36s
Regenerate ap_expr	3m 59s
APR 1.7.4, APR-util 1.6.3, LDAP	5m 27s
APR trunk thread debugging	4m 38s
UBSan	5m 3s
ASan	6m 10s
ASan, pool-debug	6m 43s
HTTP/2 test suite	11m 52s
MOD_TLS test suite	5m 4s
	2h 19m 32s

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