log

/**
 * From whole sources of the lighttpd1.4, we can find that the second and third parameter in the
 * function log_error_write and log_error_multiline_buffer are __FILE__, __LINE__ respectively.
 * So we can define two macros: log_error_write_caf,log_error_write_multiline_buffer_caf instead
 * Apparently, They avoid a lot of repeated operations. Certainly, It is not only compatible, but also
 * convenient and fast for the future's use;
 * 	"convenient and fast"  logogram: caf
 * 	So I Use of 'caf' as a suffix of the macros.
 */