nathelper: add_contact_alias() with parameters to enclose ipv6 in square brackets
- the add_contact_alias() without parameters was doing it already
- discovered while investigating GH #3968
(cherry picked from commit
744e5ac9678c0c9ef07bfb0de44c7c478a2debdc)
Gbp-Pq: Name nathelper-add_contact_alias-with-parameters-to-enclo.patch
nathelper: check if alias ipv6 has already square brackets
- GH #3968
(cherry picked from commit
6e01172a138d395fa3f7c3f25238647934137dba)
Gbp-Pq: Name nathelper-check-if-alias-ipv6-has-already-square-bra.patch