int disorder_set_global(disorder_client *c,
const char *key, const char *value);
int disorder_unset_global(disorder_client *c, const char *key);
int disorder_get_global(disorder_client *c, const char *key, char **valuep);
int disorder_set_global(disorder_client *c,
const char *key, const char *value);
int disorder_unset_global(disorder_client *c, const char *key);
int disorder_get_global(disorder_client *c, const char *key, char **valuep);