Server certificate testing ACLs

Server certificate testing ACLs

This patch add the following ACLs to test the condition of the origin server
certificate: ssl::certHasExpired, ssl::certNotYetValid, ssl::certDomainMismatch,
ssl::certUntrusted and ssl::certSelfSigned.

The above in this patch are predifined acl lists or/and can be used as error
name shortcuts with ssl_error ACL lists

Implementation details:
1) The ssl::certHasExpired,  ssl::certNotYetValid, ssl::certDomainMismatch
ssl::certUntrusted and ssl::certSelfSign acl lists are predifined in cf.data.pre

2) The above names can also used as error names. The ssl-error parser
(Ssl::ParseErrorString function) replace them with the appropriate SSL error
list.

3) The Ssl::ParseErrorString function modified to return a list of errors, not
just an error code.

4) I implement the IFDEF /ENDIF block support for cf.data.pre file.