Revert commit:

Revert commit:
  Author: stefano
  Date: Sat Jul  3 20:19:38 2010
  New Revision: 24023

  Log:
  State in the guidelines that function and parameter descriptions in
  the doxy must use impersonal verbal form.

  This form is apparently favored by most English speaker developers,
  and has the advantage of being easier to use than the third person
  form.

  This should hopefully put an end to the Third Person Holy Bikeshed
  War.

The change was neither discussed on the FFmpeg ML, nor approved by the
project leader.

The Holy War will continue soon on FFmpeg-devel, stay tuned ;-).

Originally committed as revision 24039 to svn://svn.ffmpeg.org/ffmpeg/trunk