IDEA warning for pk messages encrypted with IDEA (symmetric is already done)
Print IDEA warning for each occurance except for secret key protection and
unknown cipher from an encrypted message.
* pubkey-enc.c (get_session_key): Check that the public key
algorithm is indeed usable for en/decryption. This avoid a
strange error message from pubkey_decrypt if for some reasons a
bad algorithm indentifier is passed.
* hkp.c (hkp_export): Do not print possible control characters
from a keyserver response.
(parse_hkp_index): Made uid an unsigned char* because it is passed to
isspace().
(hkp_search): Ditto for the char* vars.
* g10.c (main): Print the IDEA warning also for -c and -se.
* g10.c (get_temp_dir): Assert that we have dropped privs
* encode.c (encode_crypt): Include the first key into the --pgp2
check.
