Fix comments

src/request_processor.rs

@@ -1,4 +1,4 @@
-//! The `request_stage` processes thin client Request messages.
+//! The `request_processor` processes thin client Request messages.
 
 use bank::Bank;
 use bincode::{deserialize, serialize};

src/sigverify_stage.rs

@@ -1,4 +1,4 @@
-//! The `sig_verify_stage` implements the signature verification stage of the TPU.
+//! The `sigverify_stage` implements the signature verification stage of the TPU.
 
 use packet::SharedPackets;
 use rand::{thread_rng, Rng};