Handle link in landing page field

[Twan Goosen]

The landing page field in the record page should get the 'handle' treatment. At the moment it gets 'smart' link processing, but this leads to issues with the @ sign used for part identifiers in handles when the 'hdl' scheme is used.

Reported by Thorsten on 20/05/14 17:25:

when accessing the following corpus
​http://catalog.clarin.eu/vlobeta/record?2&docId=tla.mpi.nl_58_collections_58_cgn&q=Hedendaags&fq=language:Dutch&index=2&count=29

I tried in the technical section to go to the landing page:
Landing page hdl:1839/00-0000-0000-0001-53A5-2@view

Nice that they use handles, but this is not a standard protocol in html
it becomes <a href="​mailto:00-0000-0000-0001-53A5-2@view">

Well, I of course prefer to use actionable handles, but I know that we
allow for both, i.e. ​http://handle.net... and hdl:1839... formats.
But a mailto... is a bug I see where it comes from (the at), but
still a problem

[Twan Goosen]

Fixed in r5268, merged to 3.0 in r5269