openpgp: Make some subpackets not critical by default.

  - Mark some subpackets created using the convenience setters on the
    signature builder as not critical according to the list given in
    #58:

        2 = Signature Creation Time - critical
        3 = Signature Expiration Time - critical
        4 = Exportable Certification - critical
        5 = Trust Signature - critical
        6 = Regular Expression - critical
        9 = Key Expiration Time - critical
       11 = Preferred Symmetric Algorithms - not critical
       16 = Issuer - not critical
       20 = Notation Data - critical if any notation is critical
       21 = Preferred Hash Algorithms - not critical
       22 = Preferred Compression Algorithms - not critical
       23 = Key Server Preferences - not critical
       24 = Preferred Key Server - not critical
       25 = Primary User ID - critical
       26 = Policy URI - not critical (not machine readable)
       27 = Key Flags - critical
       28 = Signer's User ID - critical
       29 = Reason for Revocation - not critical
       30 = Features - not critical
       31 = Signature Target - critical
       32 = Embedded Signature - critical

  - Fixes #58.

0 files changed, 0 insertions, 0 deletions