* libmisc/salt.c: The salt has a random size (between 8 and 16

bytes).
* lib/getdef.c, etc/login.defs: Add definitions for
  SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS.
* libmisc/salt.c: Use SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS
  to add a random number of rounds if needed.

lib/getdef.c

@@ -104,6 +104,8 @@ static struct itemdef def_table[] = {
 	{"PASS_MIN_LEN", NULL},
 	{"PORTTIME_CHECKS_ENAB", NULL},
 	{"QUOTAS_ENAB", NULL},
+	{"SHA_CRYPT_MAX_ROUNDS", NULL},
+	{"SHA_CRYPT_MIN_ROUNDS", NULL},
 	{"SU_WHEEL_ONLY", NULL},
 	{"ULIMIT", NULL},
 #endif