Cache extension load failures.
hg commands call extensions.loadall twice, once during dispatch and
once when the repository is instantiated. Without this change, load
caches successful loads, but not unsuccessful, causing errors to be
displayed twice.
#header#
<title>#repo|escape#: #file|escape# history</title>
<link rel="alternate" type="application/rss+xml"
href="#url#rss-log/tip/#file|urlescape#" title="RSS feed for #repo|escape#:#file#">
</head>
</head>
<body>
<div class="buttons">
<a href="#url#log{sessionvars%urlparameter}">changelog</a>
<a href="#url#shortlog{sessionvars%urlparameter}">shortlog</a>
<a href="#url#tags{sessionvars%urlparameter}">tags</a>
<a href="#url#file/#node|short#/#file|urlescape#{sessionvars%urlparameter}">file</a>
<a href="#url#annotate/#node|short#/#file|urlescape#{sessionvars%urlparameter}">annotate</a>
<a type="application/rss+xml" href="#url#rss-log/tip/#file|urlescape#">rss</a>
</div>
<h2>#file|escape# revision history</h2>
<p>navigate: <small class="navigate">{nav%filenaventry}</small></p>
#entries%filelogentry#
#footer#