ngx_log_debug6    130 core/ngx_log.h #define ngx_log_debug6  ngx_log_debug
ngx_log_debug6    161 core/ngx_log.h #define ngx_log_debug6(level, log, err, fmt,                                  \
ngx_log_debug6    188 core/ngx_log.h #define ngx_log_debug6(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5, arg6)