Require Libassuan 2.0.3
* configure.ac: Require Libassuan 2.0.3. * agent/call-scd.c (ASSUAN_CONVEY_COMMENTS): Remove macro replacement. * agent/command.c (cmd_killagent) [ASSUAN_FORCE_CLOSE]: Remove dependency. (cmd_killagent) [ASSUAN_FORCE_CLOSE]: Ditto. * scd/command.c (cmd_killscd) [ASSUAN_FORCE_CLOSE]: Ditto.