lib-mail: message_search_msg() shouldn't clear istream's stream_errno. If the input stream failed, retrying the operation without cached message_parts is unlikely to help. This also loses the original error message.
lib-mail: message_search_msg() shouldn't clear istream's stream_errno.
If the input stream failed, retrying the operation without cached
message_parts is unlikely to help. This also loses the original error
message.

dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot