ssl-verify-host: fix verifying ip addresses containing zero's (#732)

* ssl-verify-host: fix verifying ip addresses containing zero's

If the subject alternate name contained an ip address with an zero
(like 10.42.0.1) it could not successfully verify.
It is because in c++ strings are null-terminated
and therefore strlen(name) would return a wrong result.
As I can not see why we can not trust the length returned by openssl,
lets drop this check.

* ssl-verify-host: add test case

lets try to validate against 127.0.0.1

Co-authored-by: Daniel Ottiger <daniel.ottiger@ch.schindler.com>

test/test.conf

@@ -16,3 +16,6 @@ emailAddress           = test@email.address
 
 [req_attributes]
 challengePassword              = 1234
+
+[SAN]
+subjectAltName=IP:127.0.0.1