Log Message:
Update squid package to 2.5.12nb4.

o 2006-01-22 17:28 (Minor) Wrong timezone declaration for 64 bit Irix
o 2006-01-15 01:23 (Cosmetic) prctl called with too few arguments
o 2005-12-26 16:41 (Minor) Squid crash when asyncio function counters url
			   accessed from Cachemgr CGI
o 2005-12-24 11:02 (Minor) wbinfo_group.pl doesn't work with Samba 3.0.21
o 2005-12-11 10:52 (Minor) bad credentials fetch (no user)

And replace "ls" in Makefile to ${LS}.