Urbi-root: explicit on stderr variables altering the behavior.
Urbi-root: explicit on stderr variables altering the behavior.

	Basically, make sure no one gets silently fucked by URBI_ROOT
	anymore.

	* src/liburbi/urbi-root.cc: Log all URBI_* variables taken in
	account.

aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi