build,common,g13,sm,tools: Require GpgRT 1.56.
* configure.ac (NEED_GPGRT_VERSION): Require 1.56. * g13/g13.c (main): Remove support of old gpgrt. * sm/gpgsm.c (main): Likewise. * tools/gpg-wks-client.c (wrong_args, main): Likewise. * tools/gpgconf.c (my_read_reg_string): Likewise. * common/util.h (GPG_ERR_UNEXPECTED_PACKET): Likewise. * common/mapstrings.c (map_static_macro_string): Likewise.
- GnuPG-bug-id: T7855
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>