Added support for the hash:ip,mark set type.
Update Readme.md
Don't add space after range on host completion if set type is hash:ip,mark.
Update Readme.md
Adapted time range in copyright header.
Fix options not shown if action is known and cword greater than 4.
Fix lonely hyphen in option completion.
Bump version to 2.3.1.
Added the hash:ip,mark create option `markmask'.
Remove one unneeded check if cur starts with hyphen.