K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2018-08-12T00:08:14.056063Z
K 7
svn:log
V 575
getopt_long(3): Document behavior of leading characters in optstring

Leading '+', '-', and ':' in optstring have special meaning. We briefly
mention that the first two have special meaning in that we say
POSIXLY_CORRECT turns them off, but we don't actually document their
meaning. Add a paragraph to RETURN VALUES explaining how they control
the treatment of non-option arguments.

A leading ':' has no mention; add a note that it suppresses warnings about
missing arguments.

Reviewed by:	jilles
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D14142

END