Update NSS to 3.21 RTM and NSPR to 4.11 RTM

nss/lib/libpkix/include/pkix_revchecker.h

Index: nss/lib/libpkix/include/pkix_revchecker.h
diff --git a/nss/lib/libpkix/include/pkix_revchecker.h b/nss/lib/libpkix/include/pkix_revchecker.h
index 18a10cd2369d7e066b4c458b697b52204bbfe8f9..a16d23a9333643f6c8530524c624b89359965ad1 100755
--- a/nss/lib/libpkix/include/pkix_revchecker.h
+++ b/nss/lib/libpkix/include/pkix_revchecker.h
@@ -65,12 +65,10 @@ extern "C" {
  * FUNCTION: PKIX_RevocationChecker_Create
  * DESCRIPTION:
  *
- * Creates revocation checker object with a given flags.
+ * Creates a revocation checker object with the given flags. Revocation will
+ * be checked at the current date.
  *
  * PARAMETERS:
- *  "revDate"
- *      Revocation will be checked at this date. Current date is taken if the
- *      parameter is not specified.
  *  "leafMethodListFlags"
  *      Defines a set of method independent flags that will be used to check
  *      revocation of the leaf cert in the chain.