Python 3.12

[juliodiz]

multicast-relay.py:742: SyntaxWarning: invalid escape sequence '\A'
elif re.match('\A\d+.\d+.\d+.\d+\Z', interface):
multicast-relay.py:751: SyntaxWarning: invalid escape sequence '\A'
elif re.match('\A\d+.\d+.\d+.\d+/\d+\Z', interface):

Original:

elif re.match('\A\d+.\d+.\d+.\d+\Z', interface):

elif re.match('\A\d+.\d+.\d+.\d+/\d+\Z', interface):

CHANGE TO

elif re.match(r'\A\d+.\d+.\d+.\d+\Z', interface):

elif re.match(r'\A\d+.\d+.\d+.\d+/\d+\Z', interface):