wip/gpatch 2.7.6 NetBSD

This is GNU patch, which applies diff files to original files.

This version of patch has many changes made by the Free Software Foundation. They add support for: * handling arbitrary binary data and large files * the unified context diff format that GNU diff can produce * merging into files instead of creating reject files * making GNU Emacs-style backup files * improved interaction with RCS and SCCS * the GNU conventions for option parsing and configuring and compilation. * better POSIX compliance They also fix some bugs.