Log message:
Update news/libcanlock to 3.1.1

Changelog
=========
3.1.1      2019-12-29
           Bugfix: Potential buffer overflows in code from RFC6234 fixed.
            Related code is used for test suite only, installed library and
            utilities are not affected (Reported by Florian Schlichting)
           Build system: Makefile rules fixed that use DIST_SUBDIRS variable.
           src/canlock.c: Fixed typo in comment (Reported by Urs Janssen)

Log message:
libcanlock: update to 3.1.0.

From Michael Bäuerle via pkgsrc-wip.

Option "--disable-hp" added (header parsers will stay in package \ 
canlock-hp).

Changelog
=========

3.1.0      2019-01-26
           Merged canlock-hp into libcanlock package (now tracking the version
            number of the libcanlock package)
           Configure option "--disable-hp" added (Default is set to build
            canlock-hp, use this option to get the behaviour from 3.0.x)
           Manual page of canlock-hfp utility updated
           Library API and ABI are unchanged

Log message:
libcanlock: update to 3.0.3.

Provided by Michael Bäuerle via pkgsrc-wip.

3.0.3      2018-12-05
           Build system fixed for cross build (Patch suggested by Helmut Grohne,
            modified to work on macOS)

Log message:
news/libcanlock: import libcanlock-3.0.2

Packaged for wip by Michael Bäuerle.

libcanlock is a library for creating and verifying RFC 8315 Netnews
Cancel-Locks. This implementation uses the recommended algorithm from
Section 4 with HMAC based on the same hash function as <scheme>.

A command line utility "canlock" is built together with the library.

Additional header parsers (for the receiving side) are available in the
package canlock-hp.