wkd: Change client/server limit back to 64 KiB
* tools/wks-receive.c (decrypt_data): Change limit.
The former limit ~1MiB of was used during development.
(cherry picked from commit b0e8724b102535c27a8c973ec038d340858a8eb8)
- Signed-off-by: Werner Koch <wk@gnupg.org>