In v0.11.26 server is not working on older kernels due to port reuse

[izderadicka]

v0.11.26 introduced port reuse for server listener. However this is not working on older kernels ( I think it was made available on 3.9, my test server is Ubuntu 12.04 which has 3.5 and I got this problem).
The error is Protocol not available (os error 92) when binding HTTP server.

I think port reuse should be optional, as there are still quite few machines with older kernels.

[pimeys]

I think this is a duplicate and there's an issue tracking this and a possible fix here:

#1509

[izderadicka]

Yes it's duplicate of #1509, thanks.