Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC r247296: libexpat 2.1.0.

Clean some 'svn:executable' properties in the tree.

Submitted by: Christoph Mallon

While here, merge some other mergeinfo properties that
were left behind from my commits

/head/include:r241008,241141,241181
/head/contrib/gcc:r244776,244792
/head/cddl:r238457,238509,238558

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

This commit was generated by cvs2svn to compensate for changes in r178848,
which included commits to RCS files with non-trunk default branches.

Virgin import (trimmed) of eXpat v2.0.1. Discussed and tested with
sam and phk who are the two consumers of this library. If there is
any other fallout, email me and I will take care of it.

Approved by: sam, phk

Virgin import (trimmed) of eXpat version 1.95.5