strsep_noblanks
to_list = strsep_noblanks(&rule, ",");
to_list = strsep_noblanks(&rule, ",");
while ((rule = strsep_noblanks(&p, ";")) != NULL) {
to_type = strsep_noblanks(&to, "=");
to_id = strsep_noblanks(&to, "");
from_type = strsep_noblanks(&rule, "=");
from_id = strsep_noblanks(&rule, ":>");