opmsg-1.77s-bp153.1.16

- opmsg 1.77s:
  * opmsg: correct error msg handling for libcrypto error queue
  * opmsg: speeding up keystore load by introducing load flags
  * opmsg: dont generate Kex keys in null crypto/signing case
  * opmsg: allow to selfsign generated personas, so peer can also
  - -decrypt it and check sig

- Update description

- updated to 1.75s:
- updated to 1.74s:
  - opmsg: only one DH session key

- update to 1.70s:
  * adding opmux wrapper
  * KDF version 2 is default for peers with opmsg >= 1.60

- update to 1.65s:
  * opmsg: implementing deniable personas
  * opmsg: allow multiple recipients for encryption/decryption (Cc)
  * opmsg: handle mutt calling with multiple recipients (Cc)
  * opmsg: more verbose output for Cc messages

- update to 1.61s:
  * opmsg: re-adding RAND_load_file() to gen_dh_key(). Only for
    safety (already called inside main) but in case keystore is
    used externally.

- update to 1.60s:
  * added native encryption for EC personas, similar to --rsa
    override
  * dont need to construct EC_GROUP if using
    EC_KEY_new_by_curve_name() which obtains all necessary parameters
  * adjusting I/O handling for opmsg-stick/ropmsg
  * oflush vs. eflush
  * some code cleanup and additional error checks
  * implementing deniable messages
  * generalizing kex key generation (ECDH, DH), adding possibility
    to track peer-key usage
  * Adding version 2 KDF and making peer-isolation configurable

- initial package