docs/178221: Addition to handbook jails chapter: warning about make deinstall

[Brandon Thomson]

>It seems to me that the Handbook advice includes linking the
>/s/usr-local onto /usr/local inside the jail.  This is highly desirable
>for regular users because having /usr/local/bin in a PATH works just
>like on a real system.

Yes, I think that is correct. This link exists on my system where I found this
issue.

Here is a transcript of a shell session demonstrating the issue. I also
included some demonstration that the link from /usr/local to /rw/usr_local
exists and is working (note that I have used slightly different directory names
from the handbook example, so it is /rw/usr_local instead of /s/usr-local)

I probably should have included this in the first message! Sorry about that.

root at pipe:/usr/ports/ports-mgmt/portaudit # make
===> Fetching all distfiles required by portaudit-0.6.0 for building
===>  Extracting for portaudit-0.6.0
===>  Patching for portaudit-0.6.0
===>  Configuring for portaudit-0.6.0
===>  Building for portaudit-0.6.0
root at pipe:/usr/ports/ports-mgmt/portaudit # make install
===>  Installing for portaudit-0.6.0
===>   Generating temporary packing list
===>  Checking if ports-mgmt/portaudit already installed

===>  To check your installed ports for known vulnerabilities now, do:

       /usr/local/sbin/portaudit -Fda

===>   Compressing manual pages for portaudit-0.6.0
===>   Registering installation for portaudit-0.6.0
root at pipe:/usr/ports/ports-mgmt/portaudit # make deinstall
===>  Deinstalling for ports-mgmt/portaudit
===>   portaudit-0.6.0 has a different PREFIX: /rw/usr_local, skipping
root at pipe:/usr/ports/ports-mgmt/portaudit # make deinstall PREFIX=/rw/usr_local
===>  Deinstalling for ports-mgmt/portaudit
===>   Deinstalling portaudit-0.6.0

The portaudit package has been deleted.

root at pipe:/usr/ports/ports-mgmt/portaudit # readlink /usr/local
../rw/usr_local
root at pipe:/usr/ports/ports-mgmt/portaudit # ls -la /usr/
total 144
drwxr-xr-x  14 root  wheel   16 Mar 16 11:46 .
drwxr-xr-x  13 root  wheel   20 Apr 18 14:38 ..
lrwxr-xr-x   1 root  wheel   15 Mar 16 11:46 X11R6 -> ../rw/usr_X11R6
drwxr-xr-x   2 root  wheel  475 Mar 16 11:00 bin
drwxr-xr-x   2 root  wheel   16 Mar 16 10:59 games
drwxr-xr-x  53 root  wheel  283 Mar 16 10:59 include
drwxr-xr-x   7 root  wheel  556 Mar 16 10:59 lib
drwxr-xr-x   4 root  wheel  571 Mar 16 11:00 lib32
drwxr-xr-x   5 root  wheel    5 Mar 16 10:59 libdata
drwxr-xr-x   6 root  wheel   62 Mar 16 11:00 libexec
lrwxr-xr-x   1 root  wheel   15 Mar 16 11:45 local -> ../rw/usr_local
drwxr-xr-x   2 root  wheel    2 Mar 16 10:59 obj
drwxr-xr-x  68 root  wheel   83 Apr 21 20:18 ports
drwxr-xr-x   2 root  wheel  286 Mar 16 10:59 sbin
drwxr-xr-x  27 root  wheel   27 Mar 16 10:59 share
drwxr-xr-x  22 root  wheel   31 Mar 16 04:05 src
root at pipe:/usr/ports/ports-mgmt/portaudit # ls -la /usr/local/
total 111
drwxr-xr-x  13 root  wheel  13 May  7 09:00 .
drwxr-xr-x  12 root  wheel  15 May  7 09:00 ..
drwxr-xr-x   2 root  wheel   2 May  7 09:00 bin
drwxr-xr-x   6 root  wheel   6 May  7 09:02 etc
drwxr-xr-x   3 root  wheel   3 May  7 09:00 include
drwxr-xr-x   2 root  wheel   2 May  7 09:00 info
drwxr-xr-x   3 root  wheel   3 May  7 09:00 lib
drwxr-xr-x   5 root  wheel   5 May  7 09:00 libdata
drwxr-xr-x   2 root  wheel   2 May  7 09:00 libexec
drwxr-xr-x  28 root  wheel  28 May  7 09:00 man
drwxr-xr-x   2 root  wheel   2 May  7 09:02 sbin
drwxr-xr-x  15 root  wheel  15 May  7 09:00 share
drwxr-xr-x   2 root  wheel   2 May  7 09:00 www
root at pipe:/usr/ports/ports-mgmt/portaudit #