Forced commit to note the port description usually given when adding a new port.
Thanks to danfe@ for pointing out my mixup of -m and -F
Add new port devel/pecl-dio
DIO provides functions and stream wrappers which provide raw and serial low
level IO support. The use of the DIO functions should be considered only when
direct control of a device is needed. In all other cases, the standard
filesystem functions are more than adequate.
Approved by: fjoe (mentor)