Update net/dnsmasq to dnsmasq-2.75, based on patches from Benedek Gergely via
pkgsrc-users@.

ok wiz@

pkgsrc changes:
o Pass COPTS via MAKE_FLAGS. This avoid to completely rebuild dnsmasq when dbus
option is selected.

Changes:
version 2.75
            Fix reversion on 2.74 which caused 100% CPU use when a
            dhcp-script is configured. Thanks to Adrian Davey for
            reporting the bug and testing the fix.

version 2.74
            Fix reversion in 2.73 where --conf-file would attempt to
            read the default file, rather than no file.

            Fix inotify code to handle dangling symlinks better and
            not SEGV in some circumstances.

            DNSSEC fix. In the case of a signed CNAME generated by a
            wildcard which pointed to an unsigned domain, the wrong
            status would be logged, and some necessary checks omitted.

(leot)