samba36: fix segmentation fault when trying to add non-existent users

Based on a patch from НКВД. Closes #12962.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35610 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: add missing config options

r35336 exposed PTP, which has additional drivers on ixp4xx, causing it to
not build with PTP enabled.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35611 3c298f89-4303-0410-b956-a3cf2f4a3e73