Pidgin is finally linked to libsasl successfully after three attempts and now IRC plugin is enabled again. It seems that my solution of using autoreconf is not the best one for Slackware's case and Pat chose to include Makefile and Makefile.in into the patch rather than using autoreconf. Anyway, it worked and no one complained :)
hplip is now upgraded to the latest version, providing better support for HP printers. elilo is rebuilt to include x64 bootloaders instead of IA64. Pat also decided to keep IA32 as well. The last package gets rebuilt was polkit to revert a patch that is no use in Slackware's case since wheel group is not used in Slackware. Administrators should go to root group.