Fix isInNet to be a little more strict. Bug 251675, patch by Anders Holm

<anders@anders.is-a-geek.net>, r=darin, sr=bzbarsky

netwerk/base/src/nsProxyAutoConfig.js

@@ -238,7 +238,7 @@ var pacUtils =
 "}\n"+
 
 "function isInNet(ipaddr, pattern, maskstr) {\n"+
-"    var test = /^(\\d{1,4})\\.(\\d{1,4})\\.(\\d{1,4})\\.(\\d{1,4})$/(ipaddr);\n"+
+"    var test = /^(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})$/(ipaddr);\n"+
 "    if (test == null) {\n"+
 "        ipaddr = dnsResolve(ipaddr);\n"+
 "        if (ipaddr == null)\n"+