update the control spec to deprecate getinfo helper-nodes

svn:r5674

doc/control-spec.txt

@@ -343,14 +343,18 @@ $Id$
       form:
          ServerID SP ORStatus CRLF
 
-    "helper-nodes"
-      A series of lines listing the currently chosen helper nodes, if any.
+    "entry-nodes"
+      A series of lines listing the currently chosen entry nodes, if any.
       Each is of the form:
          ServerID  SP (Status-with-time / Status) CRLF
 
          Status-with-time = ("down" / "unlisted") SP ISOTime
          Status = ("up" / "never-connected")
 
+      [From 0.1.1.4-alpha to 0.1.1.10-alpha, this was called "helper-nodes".
+       Tor still supports calling it that for now, but support will be
+       removed in the future.]
+
     "accounting/enabled"
     "accounting/hibernating"
     "accounting/bytes"