Use telnet instead of http

[cl4u2]

According to my tests, olsrd's jsoninfo does not work with http (unlike txtinfo), so I here add support for telnet URIs, which are roughly equivalent to plain TCP sockets.

[coveralls]

Coverage decreased (-3.5%) to 92.59% when pulling 0680e9d on cl4u2:telnet into de625ca on ninuxorg:master.

[landscape-bot]

Code quality remained the same when pulling 0680e9d on cl4u2:telnet into de625ca on ninuxorg:master.

[coveralls]

Coverage decreased (-3.38%) to 92.71% when pulling d0dce62 on cl4u2:telnet into de625ca on ninuxorg:master.

[landscape-bot]

Code quality remained the same when pulling d0dce62 on cl4u2:telnet into de625ca on ninuxorg:master.

[nemesifier]

👍 !

do you think it's worth it to add support for the olsr txtinfo plugin too?

[cl4u2]

txtinfo support might be useful, as it is more popular than the jsoninfo, but probably is not worth the effort at this stage

[nemesifier]

@cl4u2 I'm thinking about it because it might be the only way to facilitate the migration from the old nodeshot to the new one, think about asking all the ninux gorups to update their topologies to JSON.. it may take months.. lol

[cl4u2]

A library to convert txtinfo format to JSON may be useful also for other projects

[nemesifier]

Maybe some of this code can be adapted and reused:
https://github.com/ninuxorg/nodeshot/blob/0.9.x/nodeshot/scripts/read_topology_hna.py#L62