doc: Rewrite to use 'gpgsm' instead of 'gpgsm-gencert.sh'.
* README: Rewrite to use 'gpgsm' instead of 'gpgsm-gencert.sh'. * doc/manual/scute.texi: Likewise.
We no longer ship 'gpgsm-gencert.sh' with GnuPG.
- Signed-off-by: Justus Winter <justus@g10code.com>
- Debian-bug-id: #790891