Add an A4 size poster for Google Summer of Code 2017, for people to print

and distribute around campus.

This is a minimal update for Google Summer of Code to the English
language GSoC poster from last year.  It would be nice to redesign the
poster from scratch but I don't have time right now, others are welcome
to do so.  Similarly, a US Letter sized poster would be welcome.

Remove the Polish GSoC 2016 posters, as they are out of date.

Everybody is encouraged to create posters in their local language and add
them here, either using the same design or a design of your own.  Note that
the stipend varies on a country by country basis this year: It is likely
best to avoid listing a specific stipend value.

en_US.ISO8859-1/htdocs/projects/Makefile

@@ -16,10 +16,8 @@ DOCS+=	summerofcode-2006.xml
 DOCS+=	summerofcode-2007.xml
 DOCS+=	summerofcode-2008.xml
 
-DATA=	2016-freebsd-gsoc-thumbnail.png
-DATA+=	2016-freebsd-gsoc.pdf
-DATA+=	2016-freebsd-gsoc-poland-thumbnail.png
-DATA+=	2016-freebsd-gsoc-poland.jpg
+DATA=	2017-freebsd-gsoc-thumbnail.png
+DATA+=	2017-freebsd-gsoc.pdf
 
 INDEXLINK= projects.html
 

en_US.ISO8859-1/htdocs/projects/summerofcode.xml

@@ -379,18 +379,20 @@ href="https://wiki.FreeBSD.org/SummerOfCode2005">2005</a>].</p>
     local university or college campus!  You can forward around our e-mail
     announcement to department and club mailing lists, and to department
     secretaries to distribute.  You can also print out and post copies of the
-    <a href="2016-freebsd-gsoc.pdf">FreeBSD GSoC 2016 poster</a>.
-    We have posters in both English and Polish.</p>
+    <a href="2017-freebsd-gsoc.pdf">FreeBSD GSoC 2017 poster</a>.
+  </p>
 
   <p>
-    <a href="2016-freebsd-gsoc.pdf" style="float: left;"> <img
-      src="2016-freebsd-gsoc-thumbnail.png"
-      alt="[FreeBSD GSoC 2016 poster thumbnail]" height="248" width="192"
+    <a href="2017-freebsd-gsoc.pdf" style="float: left;"> <img
+      src="2017-freebsd-gsoc-thumbnail.png"
+      alt="[FreeBSD GSoC 2017 poster thumbnail]" height="248" width="192"
       border="0" /></a>
+<!--
     <a href="2016-freebsd-gsoc-poland.jpg" style="float: left;"> <img
       src="2016-freebsd-gsoc-poland-thumbnail.png"
       alt="[FreeBSD GSoC 2016 Polish poster thumbnail]" height="248" width="192"
       border="0" /></a>
+-->
   </p>
 
   </body>