Fixed formatting of the program name for crypt.

Added another index entry.

Doc/lib/librotor.tex

@@ -99,7 +99,8 @@ The version implemented here is probably a good deal more difficult to crack
 a truly skilful and determined attacker to break the cipher.  So if you want
 to keep the NSA out of your files, this rotor cipher may well be unsafe, but
 for discouraging casual snooping through your files, it will probably be
-just fine, and may be somewhat safer than using the \UNIX{} \file{crypt}
+just fine, and may be somewhat safer than using the \UNIX{} \program{crypt}
 command.
+\index{NSA}
 \index{National Security Agency}\index{crypt(1)}
 % XXX How were Unix commands represented in the docs?

Doc/librotor.tex

@@ -99,7 +99,8 @@ The version implemented here is probably a good deal more difficult to crack
 a truly skilful and determined attacker to break the cipher.  So if you want
 to keep the NSA out of your files, this rotor cipher may well be unsafe, but
 for discouraging casual snooping through your files, it will probably be
-just fine, and may be somewhat safer than using the \UNIX{} \file{crypt}
+just fine, and may be somewhat safer than using the \UNIX{} \program{crypt}
 command.
+\index{NSA}
 \index{National Security Agency}\index{crypt(1)}
 % XXX How were Unix commands represented in the docs?