A configuration file for mathopd consists of zero or more 'items',
possibly mixed with comment text.

An item is a configuration keyword followed by zero or one arguments,
as indicated by the syntax below.

I have taken the liberty of introducing some meta-concepts to make
the syntax more readable.

When you read the phrase "X-block", please replace it with the following.

X-block: "{" X-items "}"

X-items:
	<nothing>
	X-item X-items

Keywords and arguments are separated by whitespace, that is, spaces,
tab characters, carriage returns, or line feeds.

A string is anything enclosed in double quotes ("). The quotes can be
omitted if the string is actually just a single word. To include the
double quote character itself in a string, precede the quote with a
backslash ('\').

An integer is represented using the normal 'C' conventions: '0x' in
front indicates a hexadecimal number, '0' in front indicates octal.

The '#' character, when not used inside a string, is considered the
beginning of comment text. A comment lasts until the next line.
Comments are ignored when the input file is parsed.

Configuration File Syntax
--------------------------------

configuration-item:
	"RootDirectory" string
	"CoreDirectory" string
	"Umask" integer
	"StayRoot" flag
	"User" string
	"PIDFile" string
	"Log" string
	"ErrorLog" string
	"Tuning" tuning-block
	"Control" control-block
	"Server" server-block
	"LogFormat" logformat-block
	"LogGMT" flag
	"Virtual" virtual-block

tuning-item:
	"Timeout" integer
	"BufSize" integer
	"InputBufSize" integer
	"NumConnections" integer
	"AcceptMulti" flag
	"NumHeaders" integer
	"ScriptTimeout" integer
	"ScriptBufSize" integer
	"Clobber" flag
	"Wait" integer

control-item:
	"Location" string
	"Alias" string
	"PathArgs" flag
	"IndexNames" string-block
	"Access" access-block
	"Clients" client-block
	"Types" type-block
	"Specials" type-block
	"External" type-block
	"Admin" string
	"Realm" string
	"UserFile" string
	"Error401File" string
	"Error403File" string
	"Error404File" string
	"EncryptedUserFile" flag
	"ChildLog" string
	"Export" string-block
	"ExactMatch" flag
	"ScriptUser" string
	"RunScriptsAsOwner" string
	"AllowDotfiles" flag
	"UserDirectory" flag
	"PutEnv" string-block
	"ExtraHeaders" string-block
	"PathInfo" flag
	"AutoIndexCommand" string
	"SanitizePath" flag

server-item:
	"Port" integer
	"Address" address
	"Virtual" virtual-block
	"Control" control-block
	"Backlog" integer

virtual-item:
	"Host" string
	"NoHost"
	"Control" control-block
	"AnyHost"

access-item:
	"Allow" network
	"Deny" network

client-item:
	"Apply" network
	"NoApply" network

type-item:
	string string-block

logformat-item:
	"Ctime"
	"RemoteUser"
	"RemoteAddress"
	"RemotePort"
	"LocalAddress"
	"LocalPort"
	"ServerName"
	"Method"
	"Uri"
	"Version"
	"Status"
	"ContentLength"
	"Referer"
	"UserAgent"
	"BytesRead"
	"BytesWritten"
	"QueryString"
        "TimeTaken"
	"MicroTime"

flag:
	"On"
	"Off"