Rename the FuncDeclaration overload of checkNestedReference

To distinguish it from the `VarDeclaration` overload that does something quite different.

compiler/src/dmd/expressionsem.d

@@ -5571,7 +5571,7 @@ private extern (C++) final class ExpressionSemanticVisitor : Visitor
  }
  else if (auto f = e.var.isFuncDeclaration())
  {
- if (f.checkNestedReference(sc, e.loc))
+ if (f.checkNestedFuncReference(sc, e.loc))
  return setError();
  }
 
@@ -5625,10 +5625,10 @@ private extern (C++) final class ExpressionSemanticVisitor : Visitor
  }
  else if (fd)
  {
- // TODO: If fd isn't yet resolved its overload, the checkNestedReference
+ // TODO: If fd isn't yet resolved its overload, the checkNestedFuncReference
  // call would cause incorrect validation.
  // Maybe here should be moved in CallExp, or AddrExp for functions.
- if (fd.checkNestedReference(sc, e.loc))
+ if (fd.checkNestedFuncReference(sc, e.loc))
  return setError();
  }
  else if (auto od = e.var.isOverDeclaration())
@@ -6727,7 +6727,7 @@ private extern (C++) final class ExpressionSemanticVisitor : Visitor
  exp.f.checkPurity(exp.loc, sc);
  exp.f.checkSafety(exp.loc, sc);
  exp.f.checkNogc(exp.loc, sc);
- if (exp.f.checkNestedReference(sc, exp.loc))
+ if (exp.f.checkNestedFuncReference(sc, exp.loc))
  return setError();
  }
  else if (sc.func && sc.intypeof != 1 && !(sc.ctfe || sc.debug_))
@@ -6810,7 +6810,7 @@ private extern (C++) final class ExpressionSemanticVisitor : Visitor
  if (exp.f.needThis())
  {
  // Change the ancestor lambdas to delegate before hasThis(sc) call.
- if (exp.f.checkNestedReference(sc, exp.loc))
+ if (exp.f.checkNestedFuncReference(sc, exp.loc))
  return setError();
 
  auto memberFunc = hasThis(sc);
@@ -6845,7 +6845,7 @@ private extern (C++) final class ExpressionSemanticVisitor : Visitor
 
  checkFunctionAttributes(exp, sc, exp.f);
  checkAccess(exp.loc, sc, null, exp.f);
- if (exp.f.checkNestedReference(sc, exp.loc))
+ if (exp.f.checkNestedFuncReference(sc, exp.loc))
  return setError();
 
  ethis = null;

compiler/src/dmd/funcsem.d

@@ -2272,9 +2272,9 @@ bool canInferAttributes(FuncDeclaration fd, Scope* sc)
  * then mark it as a delegate.
  * Returns true if error occurs.
  */
-bool checkNestedReference(FuncDeclaration fd, Scope* sc, const ref Loc loc)
+bool checkNestedFuncReference(FuncDeclaration fd, Scope* sc, const ref Loc loc)
 {
- //printf("FuncDeclaration::checkNestedReference() %s\n", toPrettyChars());
+ //printf("FuncDeclaration::checkNestedFuncReference() %s\n", toPrettyChars());
  if (auto fld = fd.isFuncLiteralDeclaration())
  {
  if (fld.tok == TOK.reserved)