12.04LTS 升级到 14.04LTS 后，SVN over HTTPS 中断

Question

我刚刚从 12.04LTS 升级到 14.04LTS。升级之前，我一直在 Apache 2.2 上运行 Subversion，没有任何问题。

升级后，当我从 TortoiseSVN 连接时，我收到“访问被禁止”消息，而当我通过浏览器直接从 HTTPS 连接时，我没有收到任何错误消息，只是一个空白屏幕。虽然它接受了我的登录，但我无权访问存储库。

这是尝试连接到我的服务器上的“Gravity”存储库时的错误日志示例：

[Tue May 26 09:03:02.244883 2015] [authz_svn:error] [pid 32362] [client 172.31.40.252:24361] Failed to load the mod_authz_svn config: Section name 'Gravity:' contains non-canonical fspath ''
[Tue May 26 09:03:02.244910 2015] [authz_svn:error] [pid 32362] [client 172.31.40.252:24361] Access denied: 'ccampbell' GET Gravity:/user

以下是访问文件 (位于 /etc/apache/svn_accessfile) 的示例

[groups]
gravity_users = ccampbell
[Gravity:/]
@gravity_users = rw

这是完整的 apache 配置（000-default.conf），我用“example.com”替换了实际的服务器名称

<VirtualHost *>
        ServerAdmin [email protected]
        ServerName db.example.com

        SSLEngine On
        SSLCertificateFile /etc/apache2/ssl/db_example_com_cert.cer
        SSLCertificateKeyFile /etc/apache2/ssl/apache.key

        DocumentRoot /var/www
        <Directory />
                Options FollowSymLinks
                AllowOverride None
        </Directory>
        <Directory /var/www/>
                Options Indexes FollowSymLinks
                AllowOverride None
                Order allow,deny
                allow from all
        </Directory>

        ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
        <Directory "/usr/lib/cgi-bin">
                AllowOverride None
                Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
                Order allow,deny
                Allow from all
        </Directory>

        ErrorLog /var/log/apache2/error.log

        # Possible values include: debug, info, notice, warn, error, crit,
        # alert, emerg.
        LogLevel warn

        CustomLog /var/log/apache2/access.log combined

    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

# Begin Subversion Repositories through https
<Location /Gravity>
     DAV svn
     SVNPath /svn/Gravity
     SSLRequireSSL
     AuthzSVNAccessfile /etc/apache2/svn_accessfile
     AuthType Basic
     AuthName "Gravity subversion repository"
     AuthUserFile /etc/apache2/svn_passwdfile
#     <LimitExcept GET PROPFIND OPTIONS REPORT>
        Require valid-user
#     </LimitExcept>
</Location>

</VirtualHost>

任何帮助都将不胜感激，谢谢！