Adjust links to monkey.org (use source proto)

Author: azat

index.html

@@ -270,11 +270,11 @@ <h3>Benchmark</h3>
 <table cellspacing="0" cellpadding="0">
 <tr>
 <td align="center" valign="top">
-<img src="http://monkey.org/~provos/libevent/libevent-benchmarks.jpg" alt="Benchmarks with one active connection">
+<img src="//monkey.org/~provos/libevent/libevent-benchmarks.jpg" alt="Benchmarks with one active connection">
 </td><td valign="top">
 &nbsp;
 </td><td align="center" valign="top">
-<img src="http://monkey.org/~provos/libevent/libevent-benchmark2s.jpg" alt="Benchmarks with 100 active connections">
+<img src="//monkey.org/~provos/libevent/libevent-benchmark2s.jpg" alt="Benchmarks with 100 active connections">
 </td></tr>
 <tr><td valign="top">
 The benchmark measures how long it takes to serve one active connection