Update confuse to 2.8.

Changes

- Support for specifying a searchpath for cfg_parse(), by J.J. Green
- Restore build of shared library by default, by Nathan Phillip Brink
- Added German translation, contributed by Chris Leick, Aurelien Jarno, and
  Tux^verdreifelt.
- Document CFG_SIMPLE_STR for doxygen, by Nathan Phillip Brink
- Update ISC license to 2007 version, by Joachim Nilsson
- Write files in a Bourne shell compatible way, by Alvaro G. M
- Fix mid-string environment variable substitution, by Frank Hunleth

Fixes

- Various ISO C90 and -ansi fixes by Carlo Marcelo Arenas Belon
- Fix C++ compiler warnings for const strings, by Craig McQueen
- Fix make distcheck and out-of-source builds, by Nathan Phillip Brink
- Fix missing .gitignore files, by Carlo Marcelo Arenas Belon
- Fix CFG_SIMPLE_INT on 64-bit systems, by Carlo Marcelo Arenas Belon
- Coding style cleanup by J.J. Green
- Fix issue #27: searchpath free problems. Fix to new feature introduced in
  this release cycle.
- Improved support for MSYS2 by David Grayson.

(bsiegert)