Implement IdentitiesOnly

Signed-off-by: Linus Kardell <linus.kardell@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

include/libssh/config.h

@@ -62,6 +62,7 @@ enum ssh_config_opcode_e {
     SOC_PUBKEYACCEPTEDKEYTYPES,
     SOC_REKEYLIMIT,
     SOC_IDENTITYAGENT,
+    SOC_IDENTITIESONLY,
 
     SOC_MAX /* Keep this one last in the list */
 };

include/libssh/libssh.h

@@ -408,6 +408,7 @@ enum ssh_options_e {
   SSH_OPTIONS_REKEY_TIME,
   SSH_OPTIONS_RSA_MIN_SIZE,
   SSH_OPTIONS_IDENTITY_AGENT,
+  SSH_OPTIONS_IDENTITIES_ONLY,
 };
 
 enum {

include/libssh/session.h

@@ -237,6 +237,7 @@ struct ssh_session_struct {
         uint64_t rekey_data;
         uint32_t rekey_time;
         int rsa_min_size;
+        bool identities_only;
     } opts;
     /* counters */
     ssh_counter socket_counter;