Upgrade from 5.5 failed

[Pierre Abbat]

Here are the contents of /usr/local:

bin                             llvm50
brlcad                          llvm60
env                             llvm80
etc                             man
gcc-aux                         openjdk8
include                         openssl
info                            poudriere
kde4                            sbin
lib                             share
libdata                         tests
libexec                         var
llvm35                          www
llvm36                          x86_64-portbld-dragonfly5.6
llvm40

I have scripts in /usr/local/bin/ and /usr/local/sbin/ and configuration (such 
as Postfix) in /usr/local/etc/. What should I move elsewhere or delete before 
reinstalling packages? Are any of these directories obsolete?

Pierre
-- 
La sal en el mar es más que en la sangre.
Le sel dans la mer est plus que dans le sang.