Noteworthy changes in GnuPG version 2.1.4

• gpg: Add command --quick-adduid to non-interactively add a new user id to an existing key.
• gpg: Do no enable honor-keyserver-url by default. Make it work if enabled.
• gpg: Display the serial number in the --card-status output again.
• agent: Support for external password managers. Add option --no-allow-external-cache.
• scdaemon: Improved handling of extended APDUs.
• Make HTTP proxies work again.
• All network access including DNS as been moved to Dirmngr.
• Allow building without LDAP support.

Noteworthy changes in GnuPG version 2.1.3

• gpg: LDAP keyservers are now supported by 2.1.
• gpg: New option --with-icao-spelling.
• gpg: New option --print-pka-records. Changed the PKA method to use CERT records and hashed names.
• gpg: New command --list-gcrypt-config. New parameter "curve" for --list-config.
• gpg: Print a NEWSIG status line like gpgsm always did.
• gpg: Print MPI values with --list-packets and --verbose.
• gpg: Write correct MPI lengths with ECC keys.
• gpg: Skip legacy PGP-2 keys while searching.
• gpg: Improved searching for mail addresses when using a keybox.
• gpgsm: Changed default algos to AES-128 and SHA-256.
• gpgtar: Fixed extracting files with sizes of a multiple of 512.
• dirmngr: Fixed SNI handling for hkps pools.
• dirmngr: extra-certs and trusted-certs are now always loaded from the sysconfig dir instead of the homedir.
• Fixed possible problems due to compiler optimization, two minor regressions, and other bugs.

A detailed description of the changes found in the 2.1 versions can be found at https://gnupg.org/faq/whats-new-in-2.1.html