util: introduce sss_ssh_print_pubkey()
This function will be used to print the public keys, as already done in
sss_ssh_authorizedkeys.c.
Related:
https://pagure.io/SSSD/sssd/issue/3542
Signed-off-by: Fabiano FidĂȘncio <fidencio@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>