FreeBSD/src a8d4deb (r345309)etc/rc.d Makefile, tools/build/mk OptionalObsoleteFiles.inc

Partially MFC r345079 + direct commit to stable/11.

The MFC updates tools/build/mk/OptionalObsoleteFiles.inc.

The direct commit updates etc/rc.d/Makefile becasue this file was moved
in HEAD to libexec/rc/rc.d/Makefile, making svn merge impossible.

The original log message follows:

Fix still installing ipfilter rc.d files even when WITHOUT_IPFILTER
is specified.

When WITHOUT_IPFILTER is specified, delete-old-files fails to delete
the optional rc.d files from above. Fix this.

WITHOUT_IPFILTER fails to delete the ipfilter.5 optional file during
delete-old-files. Fix this.

Reported by:    Dmitry Luhtionov <dmitryluhtionov at gmail.com>
DeltaFile
+7-4etc/rc.d/Makefile
+5-0tools/build/mk/OptionalObsoleteFiles.inc
+12-42 files

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