Fixed the OpenSSL coding style link.

Author: janpgit

docs/cstyle.html

@@ -74,7 +74,7 @@
 <li><a
 href="https://www.freebsd.org/cgi/man.cgi?query=style&apropos=0&sektion=9&manpath=FreeBSD+12.1-RELEASE+and+Ports&arch=default&format=html">FreeBSD
 kernel C coding style</a>
-<li><a href="https://www.openssl.org/policies/codingstyle.txt">OpenSSL C coding
+<li><a href="https://www.openssl-library.org/policies/technical/coding-style/">OpenSSL C coding
 style</a>
 <li><a href="https://httpd.apache.org/dev/styleguide.html">Apache C style
 guide</a>