if (!string_vformat(&gs, SVFMT_REBUFFER, format, ap))
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "string too long in header_add: "
"%.100s ...", string_from_gstring(&gs));
if (!string_vformat(&gs, SVFMT_REBUFFER, format, ap))
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "string too long in header_add: "
"%.100s ...", string_from_gstring(&gs));