Update p5-Plack from version 0.9943nb1 to version 0.9945.

Pkgsrc changes:
- adjust dependencies

Upstream changes:
0.9945  Thu Aug 19 16:24:30 PDT 2010
        - Support executing (non-perl) CGI scripts in CGIBin and WrapCGI
        - Fixed tests for win32

0.9944  Sun Aug  8 23:35:52 PDT 2010
        - Fixed Restarter for Starlet where SIGTERM doesn't quit the process (chiba)

(seb)