mydnsjpd: rename project name to 'mydnsjpd'

I decided to rename the project name from 'mydns_update' to 'mydnsjpd'
Rename and change all related files and directories for 'mydnsjpd'
Merge branch 'move_to_mydnsjpd'

This project now named to 'mydnsjpd'
So this merge makes renaming and changes to the new project name 'mydnsjpd'