Use ZeroingString for password and passpharse in wallet (#2285)

util/src/types.rs

@@ -68,6 +68,7 @@ impl Default for LoggingConfig {
 use std::ops::Deref;
 use zeroize::Zeroize;
 /// Zeroing string, mainly useful for password
+#[derive(Clone, PartialEq, PartialOrd)]
 pub struct ZeroingString(String);
 
 impl Drop for ZeroingString {
@@ -82,6 +83,12 @@ impl From<&str> for ZeroingString {
 	}
 }
 
+impl From<String> for ZeroingString {
+	fn from(s: String) -> Self {
+		ZeroingString(s)
+	}
+}
+
 impl Deref for ZeroingString {
 	type Target = str;