* The Snowball project has rerolled libstemmer_c.tgz as they
occasionally do. This time they've actually changed the code, so
patching is now required in order to compile.[1]
* Add option to link against re2 regular expression library.[2]
* PGSQL_USE -> PGSQL_USES
Submitted by: Daniel Ylitalo <daniel@blodan.se>[1]
Submitted by: Alex Storn <devzone.my@gmail.com>[2]