Database manipulation command:  run_db

SYNTAX:
	db {a|c|d|f|i|n|o|p|t} [dbname [key [value]]]

        dbname - name db creation from relation

RETURN VALUES:
	0
	1	Error.

OPTIONS:
        a[dd] dbname key value	Add key and value to db file.
        d[elete] dbname key	Delete key (and key) from db
        r[emove] ...
        f[lush] dbname    	Flush data from cache to db
        n[ull]  ... 
        c[ount] dbname		Count key in db
        p[rint] dbname		Print contents db 
        o[wner] dbname		Print owner db
        i[ndex]			Print created db
        t[oc]

NOTES:
	DBType        flush     add     remove  print   count   owner
	------        ------------------------------------------------
	incore        yes       yes     yes     yes     yes     yes
	header        yes       yes     yes     yes     yes     yes
	unordered     yes       yes     yes     yes     yes     yes
	ordered       yes       no      no      yes     yes     yes
	hostsfile     no        no      no      yes     no      no
	bind          no        no      no      no      no      no
	ndbm          yes       yes     yes     yes     yes     yes
	gdbm          yes       yes     yes     yes     yes     yes
	dbm           yes       yes     yes     yes     yes     yes
	btree         yes       yes     yes     yes     yes     yes
	yp            no        no      no      yes     no      yes
