[O] not about /usr/local slackware and debian

[Jude DaShiell]

On slackware and debian /usr/local is used by some programs sometimes 
though originally /usr/local directory hierarchy was intended to be a 
place in which things could be put by the system administrator and be left 
alone by the system's package updates system.  If it was in that folder 
hierarchy, the system's package system for updates was supposed to bypass 
it.  Actually on both slackware and debian the proper prefix for those 
systems is /usr in order to put info files where they'll be found by info 
using the infopath variable.  Specifically /usr/share/info/ and this was 
one of the things preventing me from updating existing outdated org-mode 
documentation until I figured it out.