busybox: use md5 as default password algorithm

DES is terribly outdated and a security vulnerability.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/busybox/busybox.config

@@ -496,7 +496,7 @@ CONFIG_PASSWD=y
 CONFIG_FEATURE_PASSWD_WEAK_CHECK=y
 # CONFIG_CRYPTPW is not set
 # CONFIG_CHPASSWD is not set
-CONFIG_FEATURE_DEFAULT_PASSWD_ALGO="des"
+CONFIG_FEATURE_DEFAULT_PASSWD_ALGO="md5"
 CONFIG_SU=y
 CONFIG_FEATURE_SU_SYSLOG=y
 CONFIG_FEATURE_SU_CHECKS_SHELLS=y