bootpd(8): Fix a typo in a source code comment

- s/adddress/address/

(cherry picked from commit d04df66477)

libexec/bootpd/dumptab.c

@@ -323,7 +323,7 @@ dump_generic(FILE *fp, struct shared_bindata *generic)
  *
  * The addresses are printed in standard ASCII "dot" notation and separated
  * from one another by a single space.  A single leading space is also
- * printed before the first adddress.
+ * printed before the first address.
  *
  * Null lists produce no output (and no error).
  */