webmin: allow override of webmin login and password

Don't hardcode the webmin login and password in the install script.
Instead, extract them to variables, to allow us to override them in
a bbappend.

Signed-off-by: Anders Darander <anders@chargestorm.se>

meta-webserver/recipes-webadmin/webmin/webmin_1.620.bb

@@ -65,6 +65,9 @@ do_configure() {
     sed -i "s/find_pid_command=.*/find_pid_command=pidof NAME/" config-generic-linux
 }
 
+WEBMIN_LOGIN ?= "admin"
+WEBMIN_PASSWORD ?= "password"
+
 do_install() {
     install -d ${D}${sysconfdir}
     install -d ${D}${sysconfdir}/webmin
@@ -92,8 +95,8 @@ do_install() {
     export real_os_type="${DISTRO_NAME}"
     export real_os_version="${DISTRO_VERSION}"
     export port=10000
-    export login=admin
-    export password=password
+    export login=${WEBMIN_LOGIN}
+    export password=${WEBMIN_PASSWORD}
     export ssl=0
     export atboot=1
     export no_pam=1