Remove references to Ptrcheck in the documentation, and replace
them as relevant with references to SGcheck.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11839 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/docs/xml/manual-intro.xml b/docs/xml/manual-intro.xml
index 3efbdee..79351ba 100644
--- a/docs/xml/manual-intro.xml
+++ b/docs/xml/manual-intro.xml
@@ -60,10 +60,10 @@
   </listitem>
 
   <listitem>
-    <para><command>Ptrcheck</command> is an experimental heap, stack and
-    global array overrun detector.  Its functionality overlaps somewhat
-    with Memcheck's, but it can find some problems that Memcheck would
-    miss.</para>
+    <para><command>SGcheck</command> is an experimental tool that can
+    detect overruns of stack and global arrays.  Its functionality is
+    complementary to that of Memcheck: SGcheck finds problems that
+    Memcheck can't, and vice versa..</para>
   </listitem>
 
   <listitem>