- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Update base system libexpat to 2.1.0.

MFC after: 3 days

Grammar fix.

Submitted by: Kenyon Ralph <kenyon kenyonralph com>
MFC after: 1 week

Explicitly say that this is an internal library which is intended to be
used within FreeBSD base system only, and discourage user applications
from using it. User applications should use the expat version from the
ports/package collection.

Reviewed by: simon (earlier version)
MFC after: 2 weeks

Update the lib/expat tree for the new v2.0.1 expat import. The bsdxml.h
header is now in two parts: bsdxml.h and bsdxml_external.h, representing
the expat.h and expat_external.h headers. Updated the info on the man
page as well. Also, fixed a type-error in a printf in
sbin/ifconfig/regdomain.c that would cause a compiler warning.

Approved by: sam, phk

english(4) police.

Minor tweaks to make this manpage readable.

Ok, concensus was to install libexpat under a "private brandname", and after
some deliberation the name "libbsdxml" was chosen since it conveys the two
most important attributes: "Private to FreeBSD" and "XML".

Add a skeleton man-page to give the credit and point for further
documentation. (If somebody wants to write a true mdoc manpage for
this I am sure both the eXpat people and I will be grateful).

(Still not connected to the build)