main: fix the check on inet_pton return value because it returns 1 on success.

This bug was introduced in commit b3f05653fc085193504218e47458891acf7c495d and it was preventing olsrd from working in IPv6 mode.
olsrd-quagga: Fix memory leak when adding and deleting routes
Release v0.6.5.2

Signed-off-by: Henning Rogge <hrogge@googlemail.com>
Update version after release of v0.6.5.2

Signed-off-by: Henning Rogge <hrogge@googlemail.com>
Merge branch 'release-0.6.5' of git://olsr.org/olsrd into release-0.6.5
updated to olsrd v0.6.5.2; added olsrd-mdp