Bug 1343600 - add text for NS_NET_STATUS_TLS_HANDSHAKE_STARTING and NS_NET_STATUS_TLS_HANDSHAKE_ENDED tansport states. r=valentin

netwerk/locales/en-US/necko.properties

@@ -17,6 +17,8 @@
 9=Wrote %1$S
 10=Waiting for %1$S…
 11=Looked up %1$S…
+12=Performing a TLS handshake to %1$S…
+13=The TLS handshake finished for %1$S…
 
 27=Beginning FTP transaction…
 28=Finished FTP transaction