Fixed Bug #7744

Adjusted missing #ifdef behavior to be friendly to the hooking.
http://hercules.ws/board/tracker/issue-7744-compiler-error-on-hpm-hooking-after-undefined-packetver-re/

Signed-off-by: shennetsind <ind@henn.et>
Merge branch 'master' of https://github.com/HerculesWS/Hercules
Minor plugins.conf edit

Made HPMHooking be commented out by default (no need to have it enabled since hercules is shipped with no other enabled plugins).

Signed-off-by: shennetsind <ind@henn.et>