Remove expired ports

This port is scheduled for deletion on 2005-09-22 if it is still broken
at that time and no PRs have been submitted to fix it.

Remove expired linux_base-6 port.

At Kris's request, back out the MACHINE_ARCH spelling correction until
after 5.4-RELEASE.

Assist getting more ports working on AMD64 by obeying the
Ports Collection documentation and use 'ARCH' rather than 'MACHINE_ARCH'.

Say hello to the linux mega patch, it consolidates our linux bits a
little bit and allows to proceed to a more recent linux_base from
a stable (read as: the major bugs should be ironed out or identified
and most linux ports build just fine) source.

It also allows to ship 4.11 with a working linuxolator (the EOLed
linux_base is marked forbidden because of a security hole).

This is a major update, please read UPDATING (and CHANGES if you
develop linux ports).

Changes:
 - change the default linux_base from v7 to v8
 - add a newer freetype to linux_base-8 for nicer fonts display [1]
 - don't let cpio use hardlinks in the linux_base-8 port to quiet some

SIZEify.

Bump PORTREVISION on all ports that depend on gettext to aid with upgrading.

(Part 2)

Add NO_LATEST_LINK to prevent link stomping

ECHO -> ECHO_MSG
(ECHO_CMD for deskutils/notebook)

PR:             ports/56767-56770,56772-56774,56776-56784
Submitted by:   KATO Tsuguru <tkato@prontomail.com>