Move FREEBSD-* files out of dist into vendor/ntp.

FREEBSD-Xlist

@@ -1,2 +0,0 @@
-*ports
-*html/pic

FREEBSD-upgrade

@@ -1,55 +0,0 @@
-# ex:ts=8
-#
-# $FreeBSD$
-
-NTP 4.2.8
-        originals can be found on http://www.ntp.org/downloads.html
-
-Import
-------
-
-For the import of NTP the following files were removed:
-
-        ports/*             NT files
-        html/pic/*          GIF files
-        html/build/hints/solaris.xtra.4095849 Trigger merge conflict script
-
-The stripped down version was created using FREEBSD-Xlist during
-extraction:
-
-        tar -X FREEBSD-Xlist -xvzf ntp-4.2.8.tar.gz
-        mv ntp-4.2.8 4.2.8
-
-Imported by:
-        See procedure on
-https://www.freebsd.org/doc/en_US.ISO8859-1/articles/committers-guide/subversion-primer.html
-
-Updating usr.sbin/ntp
----------------------
-
-./configure --disable-all-clocks --enable-NMEA --enable-ONCORE
---enable-RAWDCF --with-crypto --disable-debugging
---enable-LOCAL-CLOCK --with-sntp --with-arlib --prefix=/usr
-
-config.h was generated by running configure and excluding almost all clock
-drivers (what is included is DCF77 -- what I use --, NMEA, Motorola OnCORE
-and local clocks).
-
-The file is then edited to edit the value of "NO_PARENB_IGNPAR" because we
-need to set no parity on the serial port (needed for DCF77). All clock
-drivers are then disabled (some of them are included by default by ntpd).
-
-Note that there are two #ifdef to support other architectures (WRT to long
-size and endianness). They'll need to be redone for each upgrade to the
-vendor branch to keep config.h in sync.
-
-ntpd/ntp_control.c is now the only file that is different from the vendor
-branch for unsigned char/int fixes and removal of a DoS.
-
-Documentation in /usr/share/doc/ntp is generated from the HTML files with
-lynx (without the GIF files of course).
-
-A patch to fix IPV6_MULTICAST_LOOP was committed to head as r222444 and
-filed as http://bugs.ntp.org/show_bug.cgi?id=1936.  Check if still needed
-or re-apply on update.
-