config: Support more identity files in configuration

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

src/config.c

@@ -555,6 +555,7 @@ ssh_config_parse_line(ssh_session session,
       opcode != SOC_HOST &&
       opcode != SOC_MATCH &&
       opcode != SOC_INCLUDE &&
+      opcode != SOC_IDENTITY &&
       opcode > SOC_UNSUPPORTED) { /* Ignore all unknown types here */
       /* Skip all the options that were already applied */
       if (seen[opcode] != 0) {