Added three utilities for admins & developers

- There is a new option in the player panel labeled "Send back to
   Lobby", which will send a given player back to the lobby.
 - The player panel also has a shortcut to the "Spawn Character" verb.
 - Finally, there's a new config option that disables the warning
   message about multikeying if two mobs with the same CID are found;
   this option should NOT be enabled if multikeying is prohibited by the
   server rules. It is simply a developer tool, as multikeying is
   sometimes necessary to test new features that require two clients
   interacting.

code/modules/admin/admin.dm

@@ -75,6 +75,7 @@ proc/admin_notice(var/message, var/rights)
 
 	if(M.client)
 		body += "| <A HREF='?src=\ref[src];sendtoprison=\ref[M]'>Prison</A> | "
+		body += "\ <A HREF='?src=\ref[src];sendbacktolobby=\ref[M]'>Send back to Lobby</A> | "
 		var/muted = M.client.prefs.muted
 		body += {"<br><b>Mute: </b>
 			\[<A href='?src=\ref[src];mute=\ref[M];mute_type=[MUTE_IC]'><font color='[(muted & MUTE_IC)?"red":"blue"]'>IC</font></a> |
@@ -128,6 +129,8 @@ proc/admin_notice(var/message, var/rights)
 			else
 				body += "<A href='?src=\ref[src];makeanimal=\ref[M]'>Animalize</A> | "
 
+			body += "<A href='?src=\ref[src];respawn=\ref[M.client]'>Respawn</A> | "
+
 			// DNA2 - Admin Hax
 			if(M.dna && iscarbon(M))
 				body += "<br><br>"