In particular, doxygen issues the following warning:

    .../src/git/revwalk.h:86: Warning: The following parameters of \
        gitrp_sorting(git_revpool *pool, unsigned int sort_mode) are \
        not documented:
          parameter 'pool'

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Andreas Ericsson <ae@op5.se>