strip leading v from mirc version

--HG--
branch : nmdc-ircfrontend

server.go

@@ -514,6 +514,7 @@ func (s *Server) SetClientSoftwareVersion(ver string) {
 	// "AndChat 1.4.3.2 http://www.andchat.net"
 	// "liteIRC for Android 1.1.8"
 	// ":Relay:1.0:Android"
+	// "mIRC v7.45"
 
 	// A bit long and unwieldy.
 	// Heuristic: keep the first word, and the the first word containing digits
@@ -531,6 +532,11 @@ func (s *Server) SetClientSoftwareVersion(ver string) {
 		}
 	}
 
+	// Strip leading v from mIRC
+	if len(version) >= 2 && (version[0] == 'v' || version[0] == 'V') && strings.ContainsAny(string(version[1]), "0123456789") {
+		version = version[1:]
+	}
+
 	s.verbosef("Replacing client tag with '%s' version '%s'", tag, version)
 
 	s.upstreamLauncher.Self.ClientTag = tag