Add constants KSBA_VERSION and KSBA_VERSION_NUMBER.
* src/ksba.h: Rename to ... * src/ksba.h.in: this. (KSBA_VERSION, KSBA_VERSION_NUMBER): New. * configure.ac (VERSION_NUMBER): Set it. (AC_CONFIG_FILES): Add ksba.h
- Signed-off-by: Werner Koch <wk@gnupg.org>