DiffieHellman: gracefully handle platforms that fail the sha256 self test, currently only known to be PowerPC. Added support for PHP's built-in hash functions (they were added in 5.1.2) and use them in lieu of the built-in sha256 implementation when available.
<!-- Stuff related to toolbars and clickable buttons.
Used mostly in the page toolbar on most pages.
-->
<!-- VAR toolbar_start -->
<div class="toolbar">
<ul>
<!-- ENDVAR toolbar_start -->
<!-- VAR toolbar_button -->
<li>
<a title="{TITLE}" {FLAGS}>
<img alt="{TITLE}" src="{IMAGE}" />
<!-- BEGIN show_title -->
<span>{TITLE}</span>
<!-- END show_title -->
</a>
</li>
<!-- ENDVAR toolbar_button -->
<!-- VAR toolbar_label -->
<li>
<span>{TITLE}</span>
</li>
<!-- ENDVAR toolbar_label -->
<!-- VAR toolbar_end -->
</ul>
</div>
<!-- ENDVAR toolbar_end -->
<!-- VAR toolbar_vert_start -->
<div class="toolbar_vert">
<ul>
<!-- ENDVAR toolbar_vert_start -->
<!-- VAR toolbar_vert_button -->
<li>
<a title="{TITLE}" {FLAGS}>
<img alt="{TITLE}" src="{IMAGE}" />
<span>{TITLE}</span>
</a>
</li>
<!-- ENDVAR toolbar_vert_button -->
<!-- VAR toolbar_vert_label -->
<li>
<span>{TITLE}</span>
</li>
<!-- ENDVAR toolbar_vert_label -->
<!-- VAR toolbar_vert_end -->
</ul>
</div>
<!-- ENDVAR toolbar_vert_end -->