Allow to solve homedir in Unix

[gildor478]

This feature request has been migrated from artifact #414 on forge.ocamlcore.org. It was assigned to user102.

user102 posted on 2009-11-22 14:44:17:

It should be possible to replace ~ -> /home/... and ~gildor -> /home/gildor (through C system function ?)

Same thing on windows with %System% ...