Add link to a patch for libxcrypt.
@@ -1,3 +1,6 @@
libxcrypt support
* http://wiki.linuxfromscratch.org/patches/browser/trunk/shadow/shadow-4.0.18.1-owl_blowfish-1.patch
implement getlong, getulong.
avoid atoi, atol, atoul, strtol, strtoul, ...
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