Fix remote BIRD first line split of terminal prompt.

BIRD over SSH over pexpect returns first line with two birdc prompt
concatenated to the result (answer). This needs to be removed as well
as the first two lines that contains BIRD login message.

src/ulgbird.py

@@ -41,6 +41,9 @@ STRING_LOGOUT_COMMAND = 'exit'
 BIRD_SOCK_HEADER_REGEXP='^([0-9]+)[-\s](.+)$'
 BIRD_SOCK_REPLY_END_REGEXP='^([0-9]+)\s*(\s.*)?$'
 
+BIRD_CONSOLE_PROMPT_REGEXP='[^>]+>\s*'
+
+
 BIRD_SHOW_PROTO_LINE_REGEXP='^\s*([^\s]+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)(\s+([^\s].+)){0,1}\s*$'
 BIRD_SHOW_PROTO_HEADER_REGEXP='^\s*(name)\s+(proto)\s+(table)\s+(state)\s+(since)\s+(info)\s*$'
 
@@ -594,16 +597,16 @@ class BirdRouterRemote(ulgmodel.RemoteRouter,BirdRouter):
                 raise Exception("pexpect session failed: Unknown error. last output: "+s.before)
 
 
-        def stripFirstLine(string):
+        def stripFirstLines(string):
             lines = str.splitlines(string)
-            r = ''
-            for l in lines[1:]:
+            r = re.sub(BIRD_CONSOLE_PROMPT_REGEXP,'',lines[2]) + '\n'
+            for l in lines[3:]:
                 r = r + l + '\n'
             return r
 
         out = s.before
 #        ulgmodel.debug("BIRD OUT: "+out)
-        outfile.write(stripFirstLine(out))
+        outfile.write(stripFirstLines(out))
 
     def rescanPeers(self):
         res = self.runRawSyncCommand(self.RESCAN_PEERS_COMMAND)