Doc: Mention of old rand function. Change this to refer to the current.
//!
//! # Security:
//! - Use `Password::generate()` to randomly generate a password of 128 bytes.
-//! - Salts should always be generated using a CSPRNG. The `gen_rand_key`
-//! function
-//! in `util` can be used for this.
+//! - Salts should always be generated using a CSPRNG.
+//! `util::secure_rand_bytes()` can be used for this.
//! - The recommended length for a salt is 64 bytes.
//! - The iteration count should be set as high as feasible. The recommended
//! minimum is 100000.
