To build you must:
cd /usr/src && make obj && make includes
cd lib/libc && make depend && make && NOMAN=1 sudo make install
cd /usr/src && make build

This allows an application to only update a password entry if it is
in the state it expects.  Additionally, if the old passwd struct
is specified the new one may have a different pw_name field since
matching is done on the original.  Adapted from FreeBSD.

millert ok

or scaled numbers. fmt_scaled, and the format, based on Ken Stailey's
code for "df -h"; scan_scaled is new. Significantly commented on
and reworked by pjanzen@; other comments from millert@.  OK pjanzen@.

now build libraries with propolice enabled.  Without this, existing
binaries (such as ports/packages) that link with any system library
other than libc will fail with an undefined symbol of "___guard"
(__guard on ELF).
Pointed out by markus@ and discussed with deraadt@

flag and crank the library major due to the interface change.

Crank the shlib major number due to the interface change.

ok deraadt@

Reviewed by: Theo

into libutil.
Obtained from: FreeBSD
Reviewed by: Theo