e.46.1. migration to version 7.0.3

a dump/restore is not required for those running 7.0.*.

e.46.2. changes

jdbc fixes (peter) large object fix (tom) fix lean in copy with oids leak (tom) fix backwards-index-scan (tom) fix select ... for update so it checks for duplicate keys (hiroshi) add --enable-syslog to configure (marc) fix abort transaction at backend exit in rare cases (tom) fix for psql \l+ when multibyte enabled (tatsuo) allow pl/pgsql to accept non ascii identifiers (tatsuo) make vacuum always flush buffers (tom) fix to allow cancel while waiting for a lock (hiroshi) fix for memory allocation problem in user authentication code (tom) remove bogus use of int4out() (tom) fixes for multiple subqueries in coalesce or between (tom) fix for failure of triggers on heap open in certain cases (jeroen van     vianen) fix for erroneous selectivity of not-equals (tom) fix for erroneous use of strcmp() (tom) fix for bug where storage manager accesses items beyond end of file     (tom) fix to include kernel errno message in all smgr elog messages (tom) fix for '.' not in path at build time (sl baur) fix for out-of-file-descriptors error (tom) fix to make pg_dump dump 'iscachable' flag for functions (tom) fix for subselect in targetlist of append node (tom) fix for mergejoin plans (tom) fix truncate failure on relations with indexes (tom) avoid database-wide restart on write error (hiroshi) fix nodematerial to honor chgparam by recomputing its output (tom) fix vacuum problem with moving chain of update row versions when source     and destination of a row version lie on the same page (tom) fix user.c commandcounterincrement (tom) fix for am/pm boundary problem in to_char() (karel zak) fix time aggregate handling (tom) fix to_char() to avoid coredump on null input (tom) buffer fix (tom) fix for inserting/copying longer multibyte strings into char() data     types (tatsuo) fix for crash of backend, on abort (tom)