Implement native IRC gateway

programs/src/bin/irc_gateway.rs

@@ -1,3 +1,3 @@
 fn main() -> std::process::ExitCode {
-    libremetaverse_programs::pending_program("IRCGateway")
+    libremetaverse_programs::irc_gateway::main_entry()
 }

programs/src/lib.rs

@@ -2,6 +2,7 @@
 
 pub mod commands;
 pub mod inventory_explorer;
+pub mod irc_gateway;
 pub mod osd_inspector;
 pub mod packet_dump;
 pub mod prim_inspector;