Fixed empty option name

docs/APIReference.md

@@ -244,13 +244,13 @@ The function `mg_read()` receives data over an existing connection. The data is
 The option list can be used to set the following options:
 
 | Option | Default | Description |
-| :---: | :--- | :--- |
-| **`cgi_environment`** | NULL | The option `cgi_environment` can contain extra variables to be passed to the CGI script in addition to the standard environment variables. The lust must be a comma separated list of name=value pairs like this: `VARIABLE1=VALUE1,VARIABLE2=VALUE2`.|
-| **`cgi_interpreter`**| NULL | The option `cgi_interpreter` can contain a path to an executable which will be used as a CGI interpreter for **all** CGI scripts regardless of the script file extension. If this option is not set (which is the default), CivetWeb looks at the first line of a CGI script to see if an interpreter is defined there. This first line is formatted as a shebang line as common in unix style shell scripts, but this will also work in Windows. For more information about the syntax, please see the Wikipedia page about the [shebang line](http://en.wikipedia.org/wiki/Shebang_(Unix\)).|
+| :--- | :--- | :--- |
+| **`cgi_environment`** | *empty* | The option `cgi_environment` can contain extra variables to be passed to the CGI script in addition to the standard environment variables. The lust must be a comma separated list of name=value pairs like this: `VARIABLE1=VALUE1,VARIABLE2=VALUE2`.|
+| **`cgi_interpreter`**| *empty* | The option `cgi_interpreter` can contain a path to an executable which will be used as a CGI interpreter for **all** CGI scripts regardless of the script file extension. If this option is not set (which is the default), CivetWeb looks at the first line of a CGI script to see if an interpreter is defined there. This first line is formatted as a shebang line as common in unix style shell scripts, but this will also work in Windows. For more information about the syntax, please see the Wikipedia page about the [shebang line](http://en.wikipedia.org/wiki/Shebang_(Unix\)).|
 | | |For example on a Windows system where both PHP and Perl CGI scripts are used, `#!/path/to/php-cgi.exe` and `#!/path/to/perl.exe` must be the first line of the respective CGI scripts. Note that the paths should be either full file paths, or file paths relative to the current working directory of the CivetWeb server. The current working directory may be dependent on the way the application is started. When started from the command line it is the directory from where the executable was called, but when starting it from a shortcut in a graphical desktop environment, it will be the directory where the executable is located, the default directory of the user or a directory mentioned in the shortcut, depending on the operating system and graphical user interface used.|
 | | |If all CGIs use the same interpreter, it is more efficient to set the option `cgi_interpreter` to the path to that executable because in that case no processing of the shebang line is necessary. When using PHP, be sure to point tot php-cgi(.exe) and not the php(.exe) executable, as the latter is a stand alone interpreter which doesn't interface over CGI with CivetWeb.
 | **`cgi_pattern`** | `**.cgi$|**.pl$|**.php$` | All files that match `cgi_pattern` are treated as CGI files. The default pattern allows CGI files to be anywhere. To restrict CGIs to a certain directory, use `/path/to/cgi-bin/**.cgi` as a pattern. Note that the full path of the local file is matched against the pattern, not the URI provided in the client request.|
-|**`put_delete_auth_file`**| NULL | The option `put_delete_auth_file` defines the password file to be used for PUT and DELETE requests. Without a password file it is not possible to put new files to the server, or to delete existing ones. This only applies to direct HTTP requests which use the PUT and DELETE methods without server side scripting. PUT and DELETE requests might still be handled by Lua scripts and CGI pages. |
+|**`put_delete_auth_file`**| *empty* | The option `put_delete_auth_file` defines the password file to be used for PUT and DELETE requests. Without a password file it is not possible to put new files to the server, or to delete existing ones. This only applies to direct HTTP requests which use the PUT and DELETE methods without server side scripting. PUT and DELETE requests might still be handled by Lua scripts and CGI pages. |
 
 #### Returns