Log Message:
Bump verion  PR#45170

2011-07-18  Tadamasa Teranishi  <yw3t-trns@asahi-net.or.jp>

        * configure.in: Bumped version number to to 2.0.21.
        * configure.in (LTVERSION): Set "8:3:1".
        * man: update.
        * namazu.cgi:
           Fix IE6,7 cross-site scripting problem.
        * tests, pltests:
           Add New Tests.

make check have passed by changing '$WATATI =  ;' lines in pl/conf.pl
for LANG=ja, except $MECAB is set.