MFC r343009, r343109-r343110, r343128, r343232

r343009:
Add four kerberos CLI utilities to OptionalObsoleteFiles.inc

Add asn1_compile, make-roken, kcc, and slc to the OptionalObsoleteFiles.inc
so they would be removed during delete-old stage if the new world is built
without Kerberos support.

PR: 230725
Submitted by: Dmitry Wagin <dmitry.wagin@ya.ru>

r343109:
Add optional obsolete files for the installworld without sendmail

Add two more entries for WITHOUT_SENDMAIL install. The /var/spool/clientmqueue
entry would be deleted only if there are no files/dirs in it, so the
content generated during previous lifecycle of the system is safe

PR: 228484
Submitted by: Dmitry Wagin <dmitry.wagin@ya.ru>

r343110:
Fix conditional obsolete files entry for WITHOUT_EXAMPLES

Add all the files under /usr/share/examples to the MK_EXAMPLES
section. OLD_DIRS entries are not removed if they're not empty so
prior to this change WITHOUT_EXAMPLES didn't have significant effect
on the updated system.

PR: 228484
Submitted by: Dmitry Wagin <dmitry.wagin@ya.ru> (original patch)

r343128:
Add ypldap to the list of conditional obsolete files

ypldap should be removed during delete-old if WITHOUT_NIS flag is enabled

PR: 230727
Submitted by: Dmitry Wagin <dmitry.wagin@ya.ru>

r343232:
Add more profile-enabled libraries to remove when WITHOUT_PROFILE is defined

PR: 230898
Submitted by: Herbert J. Skuhra <herbert@mailbox.org>