Fix: tcpdump stopped logging upon file deletion

File is now truncated, not deleted
Separate Whitelisting and Redirections

Option "Allow whitelisting and redirections" now is split in "Allow
whitelisting" and "Allow redirections".
"Allow whitelisting" defaults to true.
"Allow redirections" defaults to "Allow whitelisting and redirections"
or false on new installations.
Text adjustments
Changelog update
Merge pull request #542 from DavisNT/master

Separated whitelisting and redirections