Build notes
The fping version 2.4b2_1-1 is compiled from the fping-2.4b2_to-ipv6.tar.gz,
to vaoid confusions with IPv4 support, changed the version to 2.4b2_1-1. 
This fping package ships two binary: fping and fping6, the fping is the IPv4 version,
and fping6 is the IPv6 version.

1. download fping-2.4b2_to-ipv6.tar.gz from http://unfix.org/projects/ipv6/fping-2.4b2_to-ipv6.tar.gz, 
   and copy it to /tmp/fping directory.
2. cd to /tmp/fping.
3. un-tar the files
4. patch the fping.c using fping.patch.ipv6
5. run ./fping-2.4b2_1-1/configure to create a Makefile.
6. tar -cvf fping.tar fping-2.4b2_1-1
7. gzip fping.tar to create a new fping.tar.gz
8. copy fping.tar.gz to /opt/freeware/src/packages/SOURCES/ directory
9. copy fping.spec to /opt/freeware/src/packages/SPECS/ directory
10. cd to  /opt/freeware/src/packages/SPECS 
11. run rpm -bb fping.spec


* patch was created using "diff -r -C 3 fping-2.4b2_1/fping.c fping-2.4b2_to-ipv6/fping.c" command