sftp/ftp: silence chatty warnings
since some times now i was seeing too much warnings like this when browsing sftp://
uri in nautilus :
gvfsd-sftp[145982]: GFileInfo created without standard::is-symlink
gvfsd-sftp[145982]: file ../../../gio/gfileinfo.c: line 1631 (g_file_info_get_is_symlink): should not be reached
gvfsd-sftp[145982]: GFileInfo created without standard::is-symlink
gvfsd-sftp[145982]: file ../../../gio/gfileinfo.c: line 1631 (g_file_info_get_is_symlink): should not be reached
[...]
It seems to come from a "recent" change in glib glib!3261 (merged)