Revision 444534

lang/python{27,33,34,35,36}: Make Python curses module work with Unicode

Use readline from ports (USES= readline:port) and patch
setup.py to ignore readline from base. The patch is necessary for
FreeBSD < 1100000, as after this the readline library became an
INTERNALLIB, see base r268461 [1]

Link devel/readline against termcapw instead of termcap is part of
this change, see ports r444463 [2]

Note that this is the **ports** approach for getting Python curses
module working with Unicode. The other way is splitting libncurses
into separate libncurses and libtinfo in base, for which an open
issue exists [3].

Apart from Python language ports, at least www/rtv and
sysutils/py-ranger ports have been tested to work correctly
(display Unicode) after this change.

[1] https://svnweb.freebsd.org/changeset/base/268461
[2] https://svnweb.freebsd.org/changeset/ports/444463
[3] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197317

PR:		171246, 197317
Reported by:	Vitaly Magerya <vmagerya gmail com>
Reviewed by:	garga, koobs, miwi, sunpoet
Approved by:	garga (mentor), sunpoet (python, with hat)
Differential Revision:	https://reviews.freebsd.org/D11127