gpg: Improve --version algo info output.
* g10/misc.c (openpgp_pk_algo_name): Return a different string for each ECC algorithm. * g10/gpg.c (build_list_pk_test_algo): New wrapper to cope with the different algo type enums. (build_list_pk_algo_name): Ditto. (build_list_cipher_test_algo): Ditto. (build_list_cipher_algo_name): Ditto. (build_list_md_test_algo): Ditto. (build_list_md_algo_name): Ditto. (my_strusage): Use them. (list_config): Ditto. Add "pubkeyname". (build_list): Add letter==1 hack.