ports/186208: Install of (textproc/libxslt) on FreeBSD 10 without libiconv package

[John Hein]

Did you do the part suggested in UPDATING where you are advised to
rebuild the 'ports_to_update' list?

Clearly there are still some ports left installed that _were_
dependent on the iconv port (and thus now need to be rebuilt).

'grep -r libiconv.la /usr/local/lib' might help if you can't
obtain the 'ports_to_update' list as suggested in UPDATING.

[This PR should go to feedback state]