PR#47943: recent update to libpcap breaks tcpdump, nmap and wireshark on Solaris

Remove bogus removal of dlpisubs.c, and force the configure script to
avoid any getifaddrs implementation on SunOS which would result in it
not being included.

Fixes build on SunOS.  Thanks to Jörn Clausen for testing on Solaris 10.

Bump PKGREVISION.  Approved during freeze by wiz.
Updated net/libpcap to 1
Spell PKGREVISION correctly.
Fix previous.
Remove obsolete patch.

Noticed by wiz@, thank you.