[FS#170] Adding routes with a proto field doesn't work

[LEDE Bugs]

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FS#170 - Adding routes with a proto field doesn't work
User who did this: Hans Dedecker (dedeckeh)
Percent Complete: 50% -> 90%

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=170