hostapd: do not trim trailing whitespace, except for newline

Fixes adding SSID or key with trailing whitespace

Signed-off-by: Felix Fietkau <[email protected]>

package/network/services/hostapd/files/hostapd.uc

@@ -571,7 +571,7 @@ function iface_load_config(filename)
 
 	let bss;
 	let line;
-	while ((line = trim(f.read("line"))) != null) {
+	while ((line = rtrim(f.read("line"), "\n")) != null) {
 		let val = split(line, "=", 2);
 		if (!val[0])
 			continue;
@@ -593,7 +593,7 @@ function iface_load_config(filename)
 		push(config.radio.data, line);
 	}
 
-	while ((line = trim(f.read("line"))) != null) {
+	while ((line = rtrim(f.read("line"), "\n")) != null) {
 		if (line == "#default_macaddr")
 			bss.default_macaddr = true;