Fixed typo in README.rst
Created by: BrentonEarl
Edited section on Slackware Current to use configuration file /etc/slpkg/slpkg.conf instead of /etc/slpkg.conf.
Created by: BrentonEarl
Edited section on Slackware Current to use configuration file /etc/slpkg/slpkg.conf instead of /etc/slpkg.conf.