Log Message:
net/ntp4: update to 4.2.8p14

Updaet ntp4 to 4.2.8p14.

pkgsrc changes:
* Incorporate several changes from NetBSD base.
* few pkglint fixes.

Quote from release announce:

NTP 4.2.8p14 (Harlan Stenn <stenn@ntp.org>, 2020 Mar 03)

Focus: Security, Bug fixes, enhancements.

Severity: MEDIUM

This release fixes three vulnerabilities: a bug that causes causes an ntpd
instance that is explicitly configured to override the default and allow
ntpdc (mode 7) connections to be made to a server to read some uninitialized
memory; fixes the case where an unmonitored ntpd using an unauthenticated
association to its servers may be susceptible to a forged packet DoS attack;
and fixes an attack against a client instance that uses a single
unauthenticated time source.  It also fixes 46 other bugs and addresses
4 other issues.