add exercise without answer

miekg · Aug 16, 2011 · 535fe4a · 535fe4a
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diff --git a/ex-communication/ex-finger.tex b/ex-communication/ex-finger.tex
@@ -1,4 +1,4 @@
-\begin{Exercise}[title={Finger daemon},difficulty=8]
+\begin{Exercise}[title={*Finger daemon},difficulty=8]
 \label{ex:finger}
 Write a finger daemon that works with the finger(1) command.
 

diff --git a/go-preface.tex b/go-preface.tex
@@ -31,7 +31,8 @@ \section*{Audience}
 new page.
 The numbering and setup of the answers is identical to the
 exercises, except that an answer starts with \textbf{A$n$}, where the
-number $n$ corresponds with the number of the exercise.
+number $n$ corresponds with the number of the exercise. Some exercises
+don't have an answer, they are marked with an asterisks.
 
 \section*{Book layout}
 \begin{description}

diff --git a/go.bib b/go.bib
@@ -269,6 +269,13 @@ @misc{go_profiling
     year = 2011,
 }
 
+@misc{RFC1196,
+    author = "D. Zimmerman",
+    title = "The Finger User Information Protocol",
+    howpublished = {\url{http://www.ietf.org/rfc/rfc1196.txt}},
+    year = 1990,
+}
+
 @misc{RFC4627,
     author = "D. Crockford",
     title = "The application/json Media Type for JavaScript Object Notation (JSON)",