OS X Apache错误日志条目 - crls（Macports到Homebrew？）

Question

昨天我将我的本地开发环境从MacPorts移到了Homebrew，一切都运行良好。但是我得到了一些奇怪的apache日志错误，我之前没有遇到过，并且想知道是否有人可以帮助诊断。

在关闭error_log时，它们似乎每隔10-15秒发生一次在Chrome中进行常规网页浏览：

[Thu Apr 26 14:19:41 2012] [error] [client 127.0.0.1] File does not exist: /Users/username/Sites/pca3.crl
[Thu Apr 26 14:20:04 2012] [error] [client 127.0.0.1] File does not exist: /Users/username/Sites/ThawtePremiumServerCA.crl
[Thu Apr 26 14:22:02 2012] [error] [client 127.0.0.1] File does not exist: /Users/username/Sites/crls
[Thu Apr 26 14:23:48 2012] [error] [client 127.0.0.1] File does not exist: /Users/username/Sites/SVRSecureG3.cer
[Thu Apr 26 14:23:49 2012] [error] [client 127.0.0.1] File does not exist: /Users/username/Sites/SVRSecureG3.crl

感谢您的任何意见。