add pointers to the qldoc of deprecated predicates

Author: erik-krogh

javascript/ql/lib/semmle/javascript/DefUse.qll

@@ -265,6 +265,7 @@ predicate definitionReaches(Variable v, VarDef def, VarUse use) {
 /**
  * Holds if the definition of local variable `v` in `def` reaches `use` along some control flow path
  * without crossing another definition of `v`.
+ * DEPRECATED: Use the `SSA.qll` library instead.
  */
 deprecated predicate localDefinitionReaches(LocalVariable v, VarDef def, VarUse use) {
   exists(SsaExplicitDefinition ssa |
@@ -273,7 +274,10 @@ deprecated predicate localDefinitionReaches(LocalVariable v, VarDef def, VarUse
   )
 }
 
-/** Holds if `nd` is a pseudo-definition and the result is one of its inputs. */
+/**
+ * Holds if `nd` is a pseudo-definition and the result is one of its inputs.
+ * DEPRECATED: Use the `SSA.qll` library instead.
+ */
 deprecated private SsaDefinition getAPseudoDefinitionInput(SsaDefinition nd) {
   result = nd.(SsaPseudoDefinition).getAnInput()
 }
@@ -296,6 +300,7 @@ private int nextDefAfter(BasicBlock bb, Variable v, int i, VarDef d) {
  *
  * This is the case if there is a path from `earlier` to `later` that does not cross
  * another definition of `v`.
+ * DEPRECATED: Use the `SSA.qll` library instead.
  */
 deprecated predicate localDefinitionOverwrites(LocalVariable v, VarDef earlier, VarDef later) {
   exists(BasicBlock bb, int i, int next | next = nextDefAfter(bb, v, i, earlier) |

javascript/ql/lib/semmle/javascript/dataflow/TaintTracking.qll

@@ -429,6 +429,7 @@ module TaintTracking {
 
   /**
    * Holds if `pred -> succ` is a taint propagating data flow edge through a string operation.
+   * DEPRECATED: Use `stringConcatenationStep` and `stringManipulationStep` instead.
    */
   pragma[inline]
   deprecated predicate stringStep(DataFlow::Node pred, DataFlow::Node succ) {
@@ -1242,6 +1243,7 @@ module TaintTracking {
 
   /**
    * Holds if taint propagates from `pred` to `succ` in one local (intra-procedural) step.
+   * DEPRECATED: Use `TaintTracking::sharedTaintStep` and `DataFlow::Node::getALocalSource()` instead.
    */
   deprecated predicate localTaintStep(DataFlow::Node pred, DataFlow::Node succ) {
     DataFlow::localFlowStep(pred, succ) or

javascript/ql/src/Declarations/Definitions.qll

@@ -1,6 +1,9 @@
 import javascript
 
-/** DEPRECATED: An identifier appearing in a defining position. */
+/**
+ * DEPRECATED: Use `SsaDefinition` from `SSA.qll` instead.
+ * An identifier appearing in a defining position.
+ */
 deprecated class DefiningIdentifier extends Identifier {
   DefiningIdentifier() {
     this instanceof VarDecl or