ui,popups: fixed dest host regexp

We were not matching the end of the domain, which could lead to allow
more domains than expected.

kudos to @fwdekker for reporting this issue.

Closes: #1264

Author: gustavo-iniguez-goya

ui/opensnitch/dialogs/prompt/_utils.py

@@ -193,7 +193,7 @@ def get_combo_operator(data, comboText, con):
         text = parts[len(parts)-1]
         # ^(|.*\.)yahoo\.com
         dsthost = r'\.'.join(text.split('.')).replace("*", "")
-        dsthost = r'^(|.*\.)%s' % dsthost[2:]
+        dsthost = r'^(|.*\.)%s$' % dsthost[2:]
         return Config.RULE_TYPE_REGEXP, Config.OPERAND_DEST_HOST, dsthost
 
     elif data == _constants.FIELD_REGEX_IP: