fix #2574 (allow 0x5f in hostnames)

src/common/xmpp_stringprep.py

@@ -185,7 +185,8 @@ class NamePrep:
 	prohibiteds = [unichr(n) for n in range(0x00, 0x2c + 1) +
 									   range(0x2e, 0x2f + 1) +
 									   range(0x3a, 0x40 + 1) +
-									   range(0x5b, 0x60 + 1) +
+									   range(0x5b, 0x5e + 1) +
+									   range(0x60, 0x60 + 1) +
 									   range(0x7b, 0x7f + 1) ]
 
 	def prepare(self, string):

src/gajim.py

@@ -1894,7 +1894,6 @@ class Interface:
 			if not gajim.config.get_per('accounts', account, 'is_zeroconf'):
 				gajim.connections[account] = common.connection.Connection(account)
 
-		# gtk hooks
 		# gtk hooks
 		gtk.about_dialog_set_email_hook(self.on_launch_browser_mailer, 'mail')
 		gtk.about_dialog_set_url_hook(self.on_launch_browser_mailer, 'url')