str_lifetime_byte
str_lifetime_byte(m_lftc, "current");
str_lifetime_byte(m_lfth, "hard");
str_lifetime_byte(m_lfts, "soft");
str_lifetime_byte(m_lft_sw, "sw offl");
str_lifetime_byte(m_lft_hw, "hw offl");
static void str_lifetime_byte(struct sadb_lifetime *, char *);