@Override
    public int getEffectiveMinorVersion()
    {
        return proxy.getEffectiveMinorVersion();
    }
The plugin classloader is an URL classloadeer, which will do lookups in directories with entries like these:
jar:file:/home/guus/github/Openfire/target/openfire/plugins/oauthresourceserver/lib/plugin-oauthresourceserver.jar!/
(note the trailing slash).

To prevent lookup failures, strip any leading slash (which, when concatinated, would result "//").

@param input A string (cannot be null)
@return The string without the first leading slash.
xmppserver/src/main/java/org/jivesoftware/openfire/container/PluginServletContext.java