Support the ident protocol

fix #3211

src/bridge/bridge.cpp

@@ -1033,6 +1033,11 @@ std::unordered_map<std::string, std::shared_ptr<IrcClient>>& Bridge::get_irc_cli
   return this->irc_clients;
 }
 
+const std::unordered_map<std::string, std::shared_ptr<IrcClient>>& Bridge::get_irc_clients() const
+{
+  return this->irc_clients;
+}
+
 std::set<char> Bridge::get_chantypes(const std::string& hostname) const
 {
   IrcClient* irc = this->find_irc_client(hostname);

src/bridge/bridge.hpp

@@ -231,6 +231,7 @@ public:
    */
   void trigger_on_irc_message(const std::string& irc_hostname, const IrcMessage& message);
   std::unordered_map<std::string, std::shared_ptr<IrcClient>>& get_irc_clients();
+  const std::unordered_map<std::string, std::shared_ptr<IrcClient>>& get_irc_clients() const;
   std::set<char> get_chantypes(const std::string& hostname) const;
 #ifdef USE_DATABASE
   void set_record_history(const bool val);