apache_table — access and manipulate Apache tables in the request structure.
The apache_table command is for accessing and manipulating Apache tables in the request structure.
The table name must be one of notes, headers_in, headers_out, err_headers_out, or subprocess_env.
tablename? ?key?tablename
				and the name of a key
				tablename,
				returns the value of the key in the table, or an empty
				string.
			    tablename? ?key? ?value?tablename? ?list?value in
				the table tablename
				under the key key.
			    list contains
				a list of zero or more pairs of key-value pairs to be
				set into the table
				tablename.
			    tablename? ?key?key,
				exists in table
				tablename,
				else 0.
			    tablename? ?key?key
				from the table
				tablename.
			    tablename?tablename.
			    tablename?tablename.
			    tablename?