Require libgpg-error 1.29 and remove internal logging functions.
* configure.ac (NEED_GPG_ERROR_VERSION): Set to 1.29 * common/util.h: Remove replacement error codes. * common/logging.h: Remove fallback to internal logging functions. * common/logging.c: Remove. * common/Makefile.am (common_sources): Remove logging.c
- Signed-off-by: Werner Koch <wk@gnupg.org>