MFC r325897:
Improve the library dependencies helper script in src/tools.

Implement double pass of the relevant Makefiles. First make a list of
library names and directories and then scan for all the dependencies.
Spaces in directories in the source tree are not supported.

This avoids using hardcoded mappings between the library name
and the directory containing the library Makefile.

Add support for scanning contrib/ofed .

Bail out on any errors.

Sponsored by: Mellanox Technologies

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Avoid rs(1) hitting LINE_MAX with custom trees that have large dependencies.

Rename libbsdyml to libyaml, make private, and bump
SHLIB_MAJOR to 1.0

Suggested by: des
Approved by: bapt
MFC after: 1 week

Make this more deterministic by sorting the libraries before processing
them and ensuring that we always use the samme collation rules.

Approved by: re (gjb)

Import libyaml as libbsdyml (private brand name)

LibYAML is a YAML 1.1 parser and emitter under MIT license which will
soon be used by the pkg boostrap (usr.bin/pkg) and bhyve

Reviewed by: roberto, antoine

- Update FreeBSD Heimdal distribution to version 1.5.1. This also brings
several new kerberos related libraries and applications to FreeBSD:
o kgetcred(1) allows one to manually get a ticket for a particular service.
o kf(1) securily forwards ticket to another host through an authenticated
and encrypted stream.
o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1)
and other user kerberos operations. klist and kswitch are just symlinks
to kcc(1) now.
o kswitch(1) allows you to easily switch between kerberos credentials if
you're running KCM.
o hxtool(1) is a certificate management tool to use with PKINIT.
o string2key(1) maps a password into key.
o kdigest(8) is a userland tool to access the KDC's digest interface.
o kimpersonate(8) creates a "fake" ticket for a service.

We also now install manpages for some lirbaries that were not installed
before, libheimntlm and libhx509.

- The new HEIMDAL version no longer supports Kerberos 4. All users are
recommended to switch to Kerberos 5.

- Weak ciphers are now disabled by default. To enable DES support (used
by telnet(8)), use "allow_weak_crypto" option in krb5.conf.

- libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings
disabled due to the function they use (krb5_get_err_text(3)) being
deprecated. I plan to work on this next.

- Heimdal's KDC now require sqlite to operate. We use the bundled version
and install it as libheimsqlite. If some other FreeBSD components will
require it in the future we can rename it to libbsdsqlite and use for these
components as well.

- This is not a latest Heimdal version, the new one was released while I was
working on the update. I will update it to 1.5.2 soon, as it fixes some
important bugs and security issues.

- Add missing interdependencies to kerberos libraries. Some of the
kerberos libraries were not linked properly (missing dependencies),
which causes 3rd party applications linking to fail when --as-needed
ld flag is used. I also added the --no-undefined ld(1) flag to make
sure that there're no missing dependencies.

MFC after: 3 days

Actualize.

- Add cddl/lib to the list of library directories.
- Add /bin to PATH to suppress a harmless warning from a
makefile that sets a variable using cat(1).

Approved by: re (kensmith)

Make use of mk/ files from a fresh source tree, rather than
the currently installed ones. This makes it possible to use
the script against Makefiles that uses bsd.own.mk on an old
system.

Submitted by: bushman

Send the pcvt(4) driver off to retirement.

Add a new extensible GSS-API layer which can support GSS-API plugins,
similar the the Solaris implementation. Repackage the krb5 GSS mechanism
as a plugin library for the new implementation. This also includes a
comprehensive set of manpages for the GSS-API functions with text mostly
taken from the RFC.

Reviewed by: Love Hörnquist Åstrand <lha@it.su.se>, ru (build system), des (openssh parts)

Teach the script where libssl actually lives.

Submitted by: Michael Bretterklieber <mbretter@a-quadrat.at>

-lbsdxml lives in lib/libexpat. *Blush*

Submitted by: tmm (Makefile.inc1)

KerberosIV deorbit sequence: Remove references to KerbIV libs.

Update for current /usr/src.

Add a tool (and the first application of it) that could be used
to automate building of libraries.

Prodded by: bde