pgindent run for 9.0

contrib/auto_explain/auto_explain.c

contrib/btree_gist/btree_cash.c

contrib/btree_gist/btree_date.c

contrib/btree_gist/btree_float4.c

contrib/btree_gist/btree_float8.c

contrib/btree_gist/btree_inet.c

contrib/btree_gist/btree_int2.c

contrib/btree_gist/btree_int4.c

contrib/btree_gist/btree_int8.c

contrib/btree_gist/btree_interval.c

contrib/btree_gist/btree_macaddr.c

contrib/btree_gist/btree_oid.c

contrib/btree_gist/btree_time.c

contrib/btree_gist/btree_ts.c

contrib/btree_gist/btree_utils_var.c

contrib/dblink/dblink.c

contrib/dict_xsyn/dict_xsyn.c

contrib/hstore/hstore.h

contrib/hstore/hstore_compat.c

contrib/hstore/hstore_gin.c