Log Message:
-----------
Restrict tsearch config file base names to contain a-z, 0-9, and underscore,
instead of the initial policy of whatever isalpha() likes. Per discussion.
Modified Files:
--------------
pgsql/src/backend/tsearch:
ts_utils.c (r1.3 -> r1.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_utils.c?r1=1.3&r2=1.4)