pgsql: Snowball multibyte.

Log Message:
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Snowball multibyte. It's a pity, but snowball sources is very diferent for multibyte and
singlebyte encodings, so we should have snowball for every encodings.

I hope that finalize multibyte support work in tsearch2, but testing is needed...

Modified Files:
--------------
pgsql/contrib/tsearch2:
Makefile (r1.12 -> r1.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/Makefile.diff?r1=1.12&r2=1.13)
dict_snowball.c (r1.9 -> r1.10)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/dict_snowball.c.diff?r1=1.9&r2=1.10)
tsearch.sql.in (r1.14 -> r1.15)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/tsearch.sql.in.diff?r1=1.14&r2=1.15)
pgsql/contrib/tsearch2/expected:
tsearch2.out (r1.16 -> r1.17)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/expected/tsearch2.out.diff?r1=1.16&r2=1.17)
pgsql/contrib/tsearch2/snowball:
Makefile (r1.8 -> r1.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/snowball/Makefile.diff?r1=1.8&r2=1.9)

Added Files:
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pgsql/contrib/tsearch2/snowball:
russian_stem_UTF8.c (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/snowball/russian_stem_UTF8.c?rev=1.1&content-type=text/x-cvsweb-markup)
russian_stem_UTF8.h (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/snowball/russian_stem_UTF8.h?rev=1.1&content-type=text/x-cvsweb-markup)
pgsql/contrib/tsearch2/stopword:
russian.stop.utf8 (r1.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/stopword/russian.stop.utf8?rev=1.1&content-type=text/x-cvsweb-markup)