Get rid of overriding default --sysconfdir and --localstatedir autoconf options

Previously the autoconf script set sysconfdir to /etc and localstatedir to /var
if they were not explicitly set in the ./configure invocation.  This MR reverts
the override and make it more in line with default and generally expected
autoconf behavior.

configure

@@ -12669,39 +12669,10 @@ fi
 
 
 #
-# Special processing of paths depending on whether --prefix,
-# --sysconfdir or --localstatedir arguments were given.  What's
-# desired is some compatibility with the way previous versions
-# of BIND built; they defaulted to /usr/local for most parts of
-# the installation, but named.boot/named.conf was in /etc
-# and named.pid was in /var/run.
+# expanded_sysconfdir is needed for replacement in the python utilities
 #
-# So ... if none of --prefix, --sysconfdir or --localstatedir are
-# specified, set things up that way.  If --prefix is given, use
-# it for sysconfdir and localstatedir the way configure normally
-# would.  To change the prefix for everything but leave named.conf
-# in /etc or named.pid in /var/run, then do this the usual configure way:
-# ./configure --prefix=/somewhere --sysconfdir=/etc
-# ./configure --prefix=/somewhere --localstatedir=/var
+# TODO: use sed in the Makefile instead of autoconf to do the replacement
 #
-# To put named.conf and named.pid in /usr/local with everything else,
-# set the prefix explicitly to /usr/local even though that's the default:
-# ./configure --prefix=/usr/local
-#
-case "$prefix" in
-	NONE)
-		case "$sysconfdir" in
-			'${prefix}/etc')
-				sysconfdir=/etc
-				;;
-		esac
-		case "$localstatedir" in
-			'${prefix}/var')
-				localstatedir=/var
-				;;
-		esac
-		;;
-esac
 expanded_sysconfdir=`eval echo $sysconfdir`