dbminsert --
Inserts a value for a key in a DBM database
Description
int dbminsert (int dbm_identifier, string key, string value)
Adds the value to the database with the specified key.
Returns -1 if the database was opened read-only, 0 if the insert
was successful, and 1 if the specified key already exists. (To
replace the value, use dbmreplace().)