Avoid using mzlib when not needed.

Author: samth

web-server-doc/info.rkt

@@ -5,10 +5,8 @@
 (define build-deps '("net-doc"
                      "net-cookies-doc"
                      "rackunit-doc"
-                     "compatibility-doc"
                      "db-doc"
                      "scribble-doc"
-                     "compatibility-lib"
                      "db-lib"
 		     "net-lib"
                      "net-cookies-lib"

web-server-doc/web-server/scribblings/server-faq.scrbl

@@ -43,9 +43,9 @@ Using @exec{exec} will reuse the same process, and therefore, the PID
 file will be accurate.
 
 Second, if you want to make your own Racket start-up script, you can write:
-@(require (for-label mzlib/os))
+@(require (for-label racket/os))
 @racketblock[
-  (require mzlib/os)
+  (require racket/os)
   (with-output-to-file _your-pid-file (lambda () (write (getpid))))
   (_start-server)
 ]