Cleaning up the gcc priority
Fixed spaces and comments
delegate host list update to main thread
fix unused-parameter warnings
Merge pull request #421 from LocutusOfBorg/169-fix2

Cleaning up the gcc priority
Merge pull request #423 from koeppea/fix-unused-param-warinings

Fix unused param warinings
Merge pull request #422 from koeppea/scan-crash

Fix Scan crash
Cleaning up some error messages
Merge pull request #424 from LocutusOfBorg/414-fix

Cleaning up some error messages 1/2
Fixing issue #189 from Simon Sokolov
Aligned with pull request #390, for better performances
Merge pull request #418 from LocutusOfBorg/189-fix2

Fixing issue #189 from Simon Sokolov
This takes care of regaining root privs before attempting to remove iptables rules and restoring ip forwarding
fixes issue #414
Merge pull request #426 from LocutusOfBorg/414-fix2

414 fix2 2/2
delaying progress dialog based on time
introduce a new function for plugins to self-destruct
threading for search_promisc plugin
threading for scan_poisoner plugin
threading for link_type plugin
automatically refresh plugin list (Gtk)