/usr/include/irssi/src/lib-config/module.h is in irssi-dev 0.8.15-5ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | #include "common.h"
#include "iconfig.h"
/* private */
int config_error(CONFIG_REC *rec, const char *msg);
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