MFC r267627:

MFC	r267627:
strptime: add support for %t and %n

Posix strptime() requires support for %t and %n, which were added
to the illumos port.  Curiously we were skipping white spaces by
default in most other cases making %t meaningless.

We now skip spaces in the case of the %e specifier as strftime(3)
explicitly adds a space for the single digit case.

Reference:
http://pubs.opengroup.org/onlinepubs/009695399/functions/strptime.html

PR:		173421
Obtained from:	Illumos (Rev. a11c1571b6942161b0186d0588609448066892c2)

git-svn-id: svn://svn.freebsd.org/base/stable/9@268574 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f