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diff --git a/security/nss/lib/util/portreg.h b/security/nss/lib/util/portreg.h
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+++ b/security/nss/lib/util/portreg.h
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * shexp.h: Defines and prototypes for shell exp. match routines
+ *
+ * This routine will match a string with a shell expression. The expressions
+ * accepted are based loosely on the expressions accepted by zsh.
+ *
+ * o * matches anything
+ * o ? matches one character
+ * o \ will escape a special character
+ * o $ matches the end of the string
+ * Bracketed expressions:
+ * o [abc] matches one occurence of a, b, or c.
+ * o [^abc] matches any character except a, b, or c.
+ *     To be matched between [ and ], these characters must be escaped: \ ]
+ *     No other characters need be escaped between brackets.
+ *     Unnecessary escaping is permitted.
+ * o [a-z] matches any character between a and z, inclusive.
+ *     The two range-definition characters must be alphanumeric ASCII.
+ *     If one is upper case and the other is lower case, then the ASCII
+ *     non-alphanumeric characters between Z and a will also be in range.
+ * o [^a-z] matches any character except those between a and z, inclusive.
+ *     These forms cannot be combined, e.g [a-gp-z] does not work.
+ * o Exclusions:
+ *   As a top level, outter-most expression only, the expression
+ *   foo~bar will match the expression foo, provided it does not also
+ *     match the expression bar.  Either expression or both may be a union.
+ *     Except between brackets, any unescaped ~ is an exclusion.
+ *     At most one exclusion is permitted.
+ *     Exclusions cannot be nested (contain other exclusions).
+ *     example: *~abc will match any string except abc
+ * o Unions:
+ *   (foo|bar) will match either the expression foo, or the expression bar.
+ *     At least one '|' separator is required.  More are permitted.
+ *     Expressions inside unions may not include unions or exclusions.
+ *     Inside a union, to be matched and not treated as a special character,
+ *     these characters must be escaped: \ ( | ) [ ~ except when they occur
+ *     inside a bracketed expression, where only \ and ] require escaping.
+ *
+ * The public interface to these routines is documented below.
+ *
+ */
+
+#ifndef SHEXP_H
+#define SHEXP_H
+
+#include "utilrename.h"
+/*
+ * Requires that the macro MALLOC be set to a "safe" malloc that will
+ * exit if no memory is available.
+ */
+
+/* --------------------------- Public routines ---------------------------- */
+
+/*
+ * shexp_valid takes a shell expression exp as input. It returns:
+ *
+ *  NON_SXP      if exp is a standard string
+ *  INVALID_SXP  if exp is a shell expression, but invalid
+ *  VALID_SXP    if exp is a valid shell expression
+ */
+
+#define NON_SXP -1
+#define INVALID_SXP -2
+#define VALID_SXP 1
+
+SEC_BEGIN_PROTOS
+
+extern int PORT_RegExpValid(const char *exp);
+
+extern int PORT_RegExpSearch(const char *str, const char *exp);
+
+/* same as above but uses case insensitive search */
+extern int PORT_RegExpCaseSearch(const char *str, const char *exp);
+
+SEC_END_PROTOS
+
+#endif