'RELENG_6_0_0_RELEASE'.

This commit was manufactured to restore the state of the 6.0-RELEASE image.

2) WARNs fixes (rename option to lookup_option to avoid shadowing, rename
   argv to argv1 to avoid shadowing, const stuff, prototypes, __unused).
3) Remove "register"s.

     -E      Interpret regular expressions followed by -regex and -iregex op-
             tions as extended (modern) regular expressions rather than basic
             regular expressions (BRE's).  The re_format(7) manual page fully
             describes both formats.

     -iname pattern
             Like -name, but the match is case insensitive.

     -ipath pattern
             Like -path, but the match is case insensitive.

     -regex pattern
             True if the whole path of the file matches pattern using regular
             expression.  To match a file named ``./foo/xyzzy'', you can use
             the regular expression ``.*/[xyz]*'' or ``.*/foo/.*'', but not
             ``xyzzy'' or ``/foo/''.

     -iregex pattern
             Like -regex, but the match is case insensitive.

These are meant to be compatible with other find(1) implementations
such as GNU's or NetBSD's except regexp library differences.

Reviewed by:	sobomax, dcs, and some other people on -current

    behave as in GNU find (and of course as described in the manual page
    diff included).  I think these options would be useful for some people.

    Some missing $FreeBSD$ tags are also added.

    The patch was slightly modified (send-pr mangling of TABS).

PR:		bin/18941
Submitted by:	Ben Smithurst <ben@scientia.demon.co.uk>

Broken in:	previous commit

The sort option make it possible to build the locate
database without large (usually 20-100MB) temp files.