HACKING,INSTALL,NEWS,NEWS.SKELETON,api/compactor.cc,
api/replication.cc,backends/Makefile.mk,backends/brass/,
backends/databasereplicator.cc,backends/dbcheck.cc,
backends/dbfactory.cc,backends/glass/,bin/Makefile.mk,
common/Makefile.mk,common/pack.h,common/pretty.h,configure.ac,docs/,
include/xapian/,net/replication_protocol.rst,tests/,tests/harness/:
Rename 'brass' backend to 'glass'.

git-svn-id: file:///home/xapian-svn/xapian/trunk@18356 6b2f1b92-a4f3-0310-943f-de3cbe41748b