remove old perl entries from ObsoleteFiles.inc

Each entry in ObsoleteFiles.inc adds to the time `make delete-old` and
friends take to run.  Perl was removed from the FreeBSD base system a
very long time ago (FreeBSD 5); source updates have not been supported
from that version for years.

Perl was a single component responsible for thousands of entries so
provides significant benefit with little effort/investigation required.
We could still use a more comprehensive cleanup to remove old entries.

Also add an UPDATING note (with wordsmithing by imp) indicating that
`make delete-old` is required along each step of a source upgrade from
an old, unsupported release.

Discussed with:	imp
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Ed Maste 2020-02-18 16:37:48 +00:00
parent 7c1daefe2c
commit 56cd269eac
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=358072
2 changed files with 6 additions and 1763 deletions

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@ -2003,6 +2003,12 @@ COMMON ITEMS:
last couple of stable branches). See the top of this file when there's
an exception.
The update process will emit an error on an attempt to perform a build
or install from a FreeBSD version below the earliest supported version.
When updating from an older version the update should be performed one
major release at a time, including running `make delete-old` at each
step.
When upgrading a live system, having a root shell around before
installing anything can help undo problems. Not having a root shell
around can lead to problems if pam has changed too much from your