o Remove explicit dependency on p5-DBD-Mysql; it is inherited

from mysql40-server;

o Add dependency on p5-DBD-Pg when building with postgres; [1]
o Do not hardcode version number three times in the Makefile;
o Do not chmod a+x configure, it is not needed;
o Remove do-install target and move installation of README file

to post-install;

o Update to version 3.0.2.

PR: 52107 [1]
Submitted by: Palle Girgensohn <girgen@rambutan.pingpong.net> [1]
Approved by: maintainer