Fixing issue 245
Adding something
Merge pull request #275 from LocutusOfBorg/fix-socket2

Fix socket2
Disable offload error print
retry for max 5 times if you cannot restore ip_forward
Merge pull request #277 from LocutusOfBorg/fix-ip_forward

retry for max 5 times if you cannot restore ip_forward
Fix man
Merge pull request #282 from LocutusOfBorg/fix-man

Fix man
Fix detection of system libnet.

The latest version of libnet from https://github.com/sam-github/libnet
has `#define LIBNET_VERSION  "1.2-rc2"`. This causes the current version
to not detect the presence of the system libnet because the regex used
to extract the version number only includes numbers and periods.

This fixes the detection of 1.2-rc* versions. No problems exist when
linking to the newer libnet library to the best of my knowledge.
fixed some mem leakage
Merge pull request #283 from h3xx/master

Fix detection of system libnet.
Merge pull request #284 from AntonioCollarino/mem_leakage

fixed some mem leakage
Merge pull request #278 from LocutusOfBorg/disable_offload

Disable offload warning/error
Disabling offloads error messages only in RELEASE mode
Merge pull request #289 from LocutusOfBorg/offload_fix

Disabling offloads error messages only in RELEASE mode
make message box horizontally scrollable
Merge pull request #291 from koeppea/messagebox-hscrollbar

make message box horizontally scrollable