Add a README note explaining that we've pulled pg_bsd_indent
into the main Postgres source tree. This copy will not be
maintained anymore.
pg_bsd_indent
+Please note that this git repo is OBSOLETE as of Feb. 2023.
+pg_bsd_indent has been absorbed into the main Postgres source tree
+(under src/tools/pg_bsd_indent) and is now maintained there.
+
+----------
+
This is a lightly modified version of the "indent" program maintained
by the FreeBSD project. The modifications are mostly to make it portable
to non-BSD-ish platforms, though we do have one formatting switch we