plain password is stored when set individual ACL using digest scheme

Plain password is stored when set individual ACL using digest scheme instead of storing the username and encoded hash string of <username:password>

[zk: localhost:2181(CONNECTED) 13] addauth digest user:pass
[zk: localhost:2181(CONNECTED) 14] setAcl /newNode digest:user:pass:crdwa
[zk: localhost:2181(CONNECTED) 15] getAcl /newNode
'digest,'user:pass
: cdrwa
[zk: localhost:2181(CONNECTED) 16]