Ports to Ignore setting is stripped of regex characters, and the Interfaces view is fatal before Cacti 1.2.31

[somethingwithproof]

mactrack_view_interfaces.php:48 on develop runs the mt_ignorePorts setting through Cacti's db_qstr_rlike():

$ignore = '(ifName NOT ' . db_qstr_rlike($match) . ' AND ifDescr NOT ' . db_qstr_rlike($match) . ')';

Two separate problems.

1. The helper strips the regular expression.

db_qstr_rlike() removes |, { and } to bound backtracking (lib/database.php:2015). That is correct for a search box, but mt_ignorePorts is an admin-configured regular expression whose shipped default is (Vlan|Loopback|Null) (setup.php:359, written by mactrack_view_interfaces.php:45). It becomes (VlanLoopbackNull).

Against MariaDB:

'Vlan10' NOT RLIKE '(Vlan|Loopback|Null)'  -> 0   suppressed, correct
'Vlan10' NOT RLIKE '(VlanLoopbackNull)'    -> 1   returned, wrong
'Gi1/0/1'                                  -> 1   either way

Every Vlan, Loopback and Null interface reappears in the Issues views (issues of -1, 0, 1, 2, 3, 9, 10, 11 and -3), and "Ignored Interfaces" (issues=-4) returns an empty list. Any admin who used {2,3} bounded repeats loses those too.

2. db_qstr_rlike() does not exist before Cacti 1.2.31.

Checked every 1.2 tag:

release/1.2.14  ABSENT
release/1.2.25  ABSENT
release/1.2.29  ABSENT
release/1.2.30  ABSENT
release/1.2.31  PRESENT

It is absent on develop as well. INFO declares compat = 1.2.14, so the Interfaces view is an undefined-function fatal on 17 of the 18 supported 1.2 releases, and on 1.3.

Introduced in #336. Fixed in #345 by quoting the pattern with db_qstr() and leaving it intact, which keeps the injection fix from #336 and removes the version dependency entirely.