Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

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

elftoolchain: Use ${SRCTOP} for the top of the FreeBSD tree

It's provided by sys.mk so there's no need to derive it from ${.CURDIR}.

Suggested by: ngie
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D5998

Replace ${CURDIR}/../.. with ${CURDIR:H:H} in elftoolchain

This produces a nicer path in debug info and build logs.

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

new depends

Build infrastructure for elftoolchain tools

Set WITH_ELFTOOLCHAIN_TOOLS in src.conf to use the elftoolchain version
of the following tools:

* addr2line
* elfcopy (strip / mcs)
* nm
* size
* strings

Reviewed by: bapt (earlier version)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D1224