Sort reference of include files, "A" - "F".

contrib/adminpack/adminpack.c

contrib/btree_gist/btree_utils_var.c

contrib/dblink/dblink.c

contrib/tsearch2/common.c

contrib/tsearch2/dict_snowball.c

src/backend/commands/conversioncmds.c

src/backend/executor/execGrouping.c

src/backend/executor/execMain.c

src/backend/executor/execUtils.c

src/backend/libpq/crypt.c

src/backend/optimizer/path/allpaths.c

src/backend/optimizer/path/costsize.c

src/backend/optimizer/plan/createplan.c

src/backend/parser/analyze.c

src/backend/postmaster/autovacuum.c

src/backend/tcop/fastpath.c

src/backend/utils/adt/arrayfuncs.c

src/backend/utils/adt/ascii.c

src/backend/utils/adt/format_type.c

src/backend/utils/cache/catcache.c