pgsql: Avoid use of CREATE OR REPLACE FUNCTION in extension installatio

Avoid use of CREATE OR REPLACE FUNCTION in extension installation files.

It was never terribly consistent to use OR REPLACE (because of the lack of
comparable functionality for data types, operators, etc), and
experimentation shows that it's now positively pernicious in the extension
world. We really want a failure to occur if there are any conflicts, else
it's unclear what the extension-ownership state of the conflicted object
ought to be. Most of the time, CREATE EXTENSION will fail anyway because
of conflicts on other object types, but an extension defining only
functions can succeed, with bad results.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/029fac2264101919b65fb6319bb994f941969471

Modified Files
--------------
contrib/adminpack/adminpack--1.0.sql | 16 +-
contrib/btree_gin/btree_gin--1.0.sql | 136 +++---
contrib/btree_gist/btree_gist--1.0.sql | 242 ++++++------
contrib/chkpass/chkpass--1.0.sql | 10 +-
contrib/citext/citext--1.0.sql | 74 ++--
contrib/cube/cube--1.0.sql | 70 ++--
contrib/dblink/dblink--1.0.sql | 80 ++--
contrib/dict_int/dict_int--1.0.sql | 4 +-
contrib/dict_xsyn/dict_xsyn--1.0.sql | 4 +-
contrib/earthdistance/earthdistance--1.0.sql | 20 +-
contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql | 20 +-
contrib/hstore/hstore--1.0.sql | 104 +++---
contrib/intagg/int_aggregate--1.0.sql | 6 +-
contrib/intarray/intarray--1.0.sql | 90 ++--
contrib/isn/isn--1.0.sql | 490 +++++++++++-----------
contrib/lo/lo--1.0.sql | 4 +-
contrib/ltree/ltree--1.0.sql | 140 +++---
contrib/pageinspect/pageinspect--1.0.sql | 16 +-
contrib/pg_buffercache/pg_buffercache--1.0.sql | 2 +-
contrib/pg_freespacemap/pg_freespacemap--1.0.sql | 4 +-
contrib/pg_trgm/pg_trgm--1.0.sql | 38 +-
contrib/pgcrypto/pgcrypto--1.0.sql | 66 ++--
contrib/pgrowlocks/pgrowlocks--1.0.sql | 2 +-
contrib/pgstattuple/pgstattuple--1.0.sql | 8 +-
contrib/seg/seg--1.0.sql | 58 ++--
contrib/spi/autoinc--1.0.sql | 2 +-
contrib/spi/insert_username--1.0.sql | 2 +-
contrib/spi/moddatetime--1.0.sql | 2 +-
contrib/spi/refint--1.0.sql | 4 +-
contrib/spi/timetravel--1.0.sql | 6 +-
contrib/sslinfo/sslinfo--1.0.sql | 18 +-
contrib/tablefunc/tablefunc--1.0.sql | 22 +-
contrib/test_parser/test_parser--1.0.sql | 8 +-
contrib/tsearch2/tsearch2--1.0.sql | 22 +-
contrib/unaccent/unaccent--1.0.sql | 8 +-
contrib/uuid-ossp/uuid-ossp--1.0.sql | 20 +-
contrib/xml2/xml2--1.0.sql | 26 +-
37 files changed, 922 insertions(+), 922 deletions(-)