Log Message:
Update 2.7.1 to 2.7.4
---------------------
Changes until version 2.7.4:

* When a file isn't being deleted because the file contents don't match the
  patch, the resulting message is now "Not deleting file ... as content
  differs from patch" instead of "File ... is not empty after patch; not
  deleting".
* Function names in hunks (from diff -p) are now preserved in reject files.
* Patch no longer follows symbolic links to input and output files.  This
  ensures that symbolic links created by git-style patches cannot cause
  patch to write outside the working directory (CVE-2015-1196).
* Various fixes.