large init script cleanup and merge of whiterussian changes, new dnsmasq config handling

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3588 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/default/usr/lib/parse-config.awk

@@ -0,0 +1,40 @@
+{
+	line=$0
+	gsub(/^[ \t]*/, "")
+	gsub(/[ \t]*$/, "")
+}
+
+$1 == "@define" {
+	v[$2] = $3
+}
+
+$1 == "@ifdef" {
+	if_open = 1
+	if (v[$2] != "") noprint = 0
+	else noprint = 1
+}
+
+$1 == "@ifndef" {
+	if_open = 1
+	if (v[$2] != "") noprint = 1
+	else noprint = 0
+}
+
+$1 == "@else" {
+	if (noprint == 1) noprint = 0
+	else noprint = 1
+}
+
+($1 !~ /^@/) && (noprint != 1) {
+	n=split(line "@@", a, /@@/)
+	for (i=1; i<=n; i++) {
+		if ((i % 2) == 1) printf a[i]
+		else printf v[a[i]]
+	}
+	print ""
+}
+
+$1 == "@endif" {
+	if_open = 0
+	noprint = 0
+}