BUG/MEDIUM: init: don't use environment locale

BUG/MEDIUM: init: don't use environment locale

This patch removes setlocale from the main function. It was introduced
by commit 379d9c7 ("MEDIUM: init: allow directory as argument of -f")
in 1.7-dev a few commits ago after a discussion on the mailing list.

Some regex may have different behaviours depending on the
locale. Some LUA scripts may change their behaviour too
(http://lua-users.org/wiki/LuaLocales).

Without this patch (haproxy is using setlocale) :

	$ cat locale.cfg
	defaults
	  mode http

	frontend test
	  bind :9000
	  mode http
	  use_backend testbk if { hdr_reg(X-Test) ^\w+$ }

	backend testbk
	  mode http
	  server s 127.0.0.1:80

	$ LANG=fr_FR.UTF-8 ./haproxy -f locale.cfg
	$ curl -i -H "X-Test: échec" localhost:9000
	HTTP/1.1 200 OK
	...

	$ LANG=C ./haproxy -f locale.cfg
	$ curl -i -H "X-Test: échec" localhost:9000
	HTTP/1.0 503 Service Unavailable
	...