Add optional _RAW suffix to SSL_*_DN_xx attribute names, allowing

Add optional _RAW suffix to SSL_*_DN_xx attribute names, allowing
users to convert an attribute value without conversion to UTF-8.  (A
public CA has issued certs with attributes tagged as the wrong ASN.1
string types.)

* modules/ssl/ssl_util_ssl.c (asn1_string_convert): Rename from
  asn1_string_to_utf8; add raw argument. Reimplement _to_utf8 as
  macro.
  (modssl_X509_NAME_ENTRY_to_string): Add raw argument.

* modules/ssl/ssl_engine_vars.c (ssl_var_lookup_ssl_cert_dn): Use raw
  string conversion if _RAW suffix is present in DN component.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1811976 13f79535-47bb-0310-9956-ffa450edef68