inotify: improve error messages * prefix messages by inotify-(client|server) * make sure that all warning and abort messages use the same format. * in the case where inotify.sock is an old broken symlink, say so and abort instead of trying to overwrite the already existing link

--- a/tests/test-inotify	Wed Nov 18 22:23:11 2009 -0500
+++ b/tests/test-inotify	Thu Nov 19 11:06:01 2009 +0900
@@ -33,6 +33,10 @@
 
 # let the daemon finish its stuff
 sleep 1
+
+echo % cannot start, already bound
+hg inserve
+
 # issue907
 hg status
 echo % clean