* g10/keygen.c (DEFAULT_STD_SUBKEYUSE): New.
(ask_keysize): Factor code out to ...
(get_keysize_range, fixup_keysize): new.
(parse_parameter_usage): Factor parsing out to  ...
(parse_usagestr): new.  Allow use of "encr" as alias for "encrypt".
(parse_subkey_algostr_usagestr): New.
(generate_subkeypair): Add new args.  Implement unattended mode.
* g10/keyedit.c (keyedit_quick_sign): Factor some code out to ...
(find_by_primary_fpr): new.
(keyedit_quick_addkey): New.
* g10/gpg.c (aQuickAddKey): New.
(opts): Add --quick-addkey.
(main): Implement.