Update net/fping to version 3.4 and point to the new home.
Merge IPv4 and IPv6 support into net/fping, selectable via options.
Remove the now un-needed net/fping+ipv6
Add common description for IPV4 option, analogous to the IPV6 option
PR: ports/169949 , ports/169950 
Submitted by: Rodrigo OSORIO <firstname.lastname@example.org> 
Jason Harris <email@example.com> 
zeising (final patch version)
Approved by: maintainer, kwm (mentor)