Update handin-server docs.

collects/handin-server/main.rkt

@@ -602,7 +602,7 @@
                      (lambda (x)
                        (set! no-limit-warning? #t)
                        (log-line "WARNING: per-session memory limit ~a"
-                                 "not supported by MrEd"))])
+                                 "not supported by GRacket"))])
       (custodian-limit-memory
        session-cust (get-conf 'session-memory-limit) session-cust)))
   (let ([watcher (parameterize ([current-custodian orig-custodian])

collects/handin-server/overridden-collects/readme.txt

@@ -1,12 +1,12 @@
 This directory is used (by default) as a first root for searching
-collections when evaluating user code.  This means that PLT libraries
-that appear here will be used instead of ones in the PLT tree or the
+collections when evaluating user code.  This means that Racket libraries
+that appear here will be used instead of ones in the Racket tree or the
 user-local collections.  Use it to override collections that are safe
-for testing, for example -- avoid using actual gui.  See also the
+for testing, for example -- avoid using real GUI.  See also the
 documentation for `sandbox-override-collection-paths' in "doc.txt".
 
 This is currently used with the `teachpack' collection.  Note that
-mzscheme resolved collection directories based on toplevel names only,
+Racket resolves collection directories based on toplevel names only,
 which means that if we actually use `teachpack' for the directory
 name, then files that are not here will not be searched in the usual
 plt tree.  Because of this the collection is called `fake-teachpack',

collects/handin-server/scribblings/checker.scrbl

@@ -36,7 +36,7 @@ keywords to customize features that you want it to have.  The body of
 the checker (following the keywords) can contain arbitrary code, using
 utility functions from @schememodname[handin-server/utils], as well as
 additional ones that are defined below.  Submission files are arriving
-to the handin server in binary form (in the MrEd format that is used
+to the handin server in binary form (in the GRacket format that is used
 to store text and other objects like images), and a number of these
 options involve genrating a textual version of this file.  The purpose
 of these options is to have these text files integrate easily into a
@@ -127,7 +127,7 @@ Keywords for configuring @scheme[check:]:
   @filepath{hw.scm}.  (The suffix changes the defaults of
   @scheme[:markup-prefix] and @scheme[:prefix-re].)  Can be
   @scheme[#f] for removing the original file after processing.  The
-  file is always stored in MrEd's binary format.}
+  file is always stored in GRacket's binary format.}
 
 @item{@indexed-scheme[:multi-file]---by default, this is set to
   @scheme[#f], which means that only DrScheme is used to send

collects/handin-server/scribblings/quick-start.scrbl

@@ -28,7 +28,8 @@
 @item{Create a file @filepath{config.ss} with the following content:
   @schemeblock[((active-dirs ("test")))]}
 
-@item{In your new directory, run @commandline{mred-text -l handin-server}}
+@item{In your new directory, run
+  @commandline{gracket-text -l handin-server}}
 
 @item{In the @filepath{handin-client} collection, edit
   @filepath{info.ss} and uncomment the lines that define

collects/handin-server/scribblings/server-setup.scrbl

@@ -53,8 +53,8 @@ This directory contains the following files and sub-directories:
 
   @item{@indexed-scheme[session-memory-limit] --- maximum size in
     bytes of memory allowed for per-session computation, if
-    per-session limits are supported (i.e., when using MrEd and
-    MzScheme with the (default) exact garbage collector and memory
+    per-session limits are supported (i.e., when using GRacket and
+    Racket with the (default) exact garbage collector and memory
     accounting); the default is 40000000.}
 
   @item{@indexed-scheme[default-file-name] --- the default filename
@@ -437,10 +437,10 @@ This directory contains the following files and sub-directories:
   will be listed and accessible.}
 ]
 
-The server can be run within either MzScheme or MrEd, but
-@schememodname[handin-server/utils] requires MrEd (which means that
+The server can be run within either Racket or GRacket, but
+@schememodname[handin-server/utils] requires GRacket (which means that
 @scheme[checker] modules will likely require the server to run under
-MrEd).  Remember that if you're not using the (default) 3m garbage
+GRacket).  Remember that if you're not using the (default) 3m garbage
 collector you don't get memory accounting.
 
 The server currently provides no mechanism for a graceful shutdown,

collects/handin-server/scribblings/wheres-the-collection.scrbl

@@ -5,7 +5,7 @@
 
 If you obtained the server and client by installing a @filepath{.plt}
 file, then the @filepath{handin-server} and @filepath{handin-client}
-directories might be in your PLT addon space.  Start MzScheme, and
+directories might be in your PLT addon space.  Start Racket, and
 enter @schemeblock[(collection-path "handin-server")]
 @schemeblock[(collection-path "handin-client")] to find out where
 these collections are.