Documentation update for Issue #2623

Changes based on Issue #2623 - DescriptorNeverClosed.ql identifies only sockets (not file handles)

Author: marcrepo

cpp/ql/src/Critical/DescriptorNeverClosed.qhelp

@@ -6,15 +6,15 @@
 
 <overview>
 <p>
-This rule finds calls to <code>open</code> or <code>socket</code> where there is no corresponding <code>close</code> call in the program analyzed.
+This rule finds calls to <code>socket</code> where there is no corresponding <code>close</code> call in the program analyzed.
 Leaving descriptors open will cause a resource leak that will persist even after the program terminates.
 </p>
 
 <include src="aliasAnalysisWarning.qhelp" />
 </overview>
 
 <recommendation>
-<p>Ensure that all file or socket descriptors allocated by the program are freed before it terminates.</p>
+<p>Ensure that all socket descriptors allocated by the program are freed before it terminates.</p>
 </recommendation>
 
 <example>