Merge riastradh-drm2 to HEAD.

Commit the patches in Wolfgang Stukenbrock's PR bin/41896.

(1) Do not serve UIDs below MINUID in master.passwd.* maps,
just like in passwd.* maps.

(2) Since stdethers(8) and stdhosts(8) strip comments, we do
not have to do it here, much less inconsistently.

branches: 1.21.40; 1.21.46; 1.21.52;
PR/31956: Andrew Daugherity: Makefile.yp: shadow.byname map should respect
MINUID

Patch applied and verified by francisg@#NetBSD-code, thanks!

when generating maps, use -n argument to stdhosts(1) so ipv6 addresses
are allowed.

PR/5999: Todd Vierling: minor nits about Makefile.yp
Provide MINUID and MINGID variables to specify the minimum uid and gid to
be included in the password and group maps.

- Filter out the YP_ keys from mail.aliases. How did this ever work?
- Don't be verbose when creating the amd maps.

* Allow generating more than one amd map, by storing the maps to create
in a variable that can be added other maps than amd.home. Patch submitted
in PR 11826 by Anthony Mallet <anthony.mallet@ficus.yi.org>
* Slightly optimize calculation of DOMAIN

Fix bogus awk + sed combination to handle continuations and empty lines.
It broke a sequence of:

key1 \
value1 \
value2 \
value3 \


key2 \
value4 \


etc.

Handle both the netgroup rule and the amd.home rule using a .USEBEFORE
macro rule, since they contain the same code.
XXX: Needs new make(1)

`accessible' only has one `a'.

Fix the sorting introduced in rev 1.9 for the netgroup map:
handle entries that span multiple lines correctly.

/etc/mail/aliases, not /etc/aliases. PR 10167.

oops, use MAKEDBM_S

add a non-enabled rule to build solaris and linux shadow files.

generate ipnodes.{byname,byaddr} for IPv4/v6 lookups.
hosts.{byname,byaddr} is still an IPv4 only mapping.
obeys solaris8 practice. see comments in ypinit/Makefile.yp for details.

TODO: interop test with solaris8 (any takers?)

branches: 1.9.4;
Our db btree(3) implementation is tuned for ordered insertion, so pipe
through sort before makedbm.
This drops Erik Rungi's <rungus@openface.ca> passwd.byname generation for
3000 entries from 25-30 seconds down to 0.75 seconds.

branches: 1.8.2; 1.8.6;
disable INSECURE=yes now that libc support master.passwd YP maps

note that INSECURE=no isn't yet supported for netbsd clients

* rewrite read_line(), partially based on get_line in netgroup_mkdb.c:
- use fgetln() instead of fgets()
- store info in internal buffer
- fix \\ support
- count line numbers internally, so \\ lines don't mess up count
* ypdb_store():
- ensure that the length of key or val doesn't exceed YPMAXRECORD
* makedbm, mknetid, revnetgroup, stdethers, stdhosts:
- improve error handling
- take advantage of rewritten read_line(), and cleanup line parsing
- don't print trailing ` ' for key/val pairs with an empty val
* Makefile.yp:
- fix up building of ypservers (from Chuck Cranor)
* ypinit.sh:
- remove leading spaces in variable assignment (from Chuck Cranor)

branches: 1.5.2;
- major cleanup of Makefile.yp to use modern make(1) variables, and
follow our formatting convetions.
- add support for aliases, amd.home, master.passwd and netgroup maps
[initially from openbsd, reworked as above]
- if INSECURE != "yes" then the passwd.by* maps will not contain the
encrypted version of the passwd - privileged clients will request
info from the master.passwd.by* maps.
FreeBSD originally implemented this, and & OpenBSD supports it too.
[from openbsd].

By default, passwd maps are INSECURE, but in a *BSD-only environment,
this could be disabled to allow for a [slightly] higher degree of
security from non-root users...

pushed ethers, not hosts

Alter the ypservers rule a bit to always make sure that this map
exists.

Add a rule for the `ypservers' map (the map containing a list of
slaves for the YP domain). This map is not built by default, but the
rule exists to make adding slave servers a bit easier.

branches: 1.1.1;
Initial revision