int parse_time(const char *t, usec_t *usec, usec_t default_unit);
#if 0 /// UNNEEDED by elogind
int parse_nsec(const char *t, nsec_t *nsec);
int parse_time(const char *t, usec_t *usec, usec_t default_unit);
#if 0 /// UNNEEDED by elogind
int parse_nsec(const char *t, nsec_t *nsec);