Update cproto to 4.7i.
Based on PR#43763 by Kamel Derouiche, additionaly, some clean up.

2010/07/14 (4.7i)
- escape dashes used in manpage, to work with groff (patch by Kenneth
  Pronovici)
- add RPM and Debian build scripts, for testing.
- add configure checks for ctags and lint program.
- fix strict compiler warnings, e.g., using const.
- support DESTDIR variable in makefile.
- drop mkdirs.sh, use "mkdir -p"
- several improvements to configure macros
  - quoted ifelse() params
  - distinguish Darwin 9 from previous releases
  - ignore stderr in check for gcc version, to work with c89 wrapper.
- use consistent date and formatting in the CHANGES file, for processing
  contributor's information using a script.
- update config.guess, config.sub

2009/09/3 (4.7h)
- updated configure macros CF_ADD_CFLAGS CF_GCC_ATTRIBUTES CF_GCC_WARNINGS
  CF_XOPEN_SOURCE
- update config.guess, config.sub

2008/11/19 (4.7g)
- modify cpp command to redirect stderr to /dev/null if -q option is given,
  for consistency with the non-cpp mode (report by Nicolas Limare).
  https://bugs.launchpad.net/ubuntu/+source/cproto/+bug/275248
- add configure --disable-leaks option.
- use configure macro CF_XOPEN_SOURCE macro to make mkstemp() prototyped on
  Linux.
- remove isascii() usage.
- code cleanup, to remove K&R relics.
- update config.guess, config.sub


(obache)