[Opensim-dev] Mono minimum version bump

[Melanie]

Hello,

after discovering a bug in the 2.0.1 version of mono, which causes 
frequent crashing of regions, we have taken the step to bump the 
minimum required mono version to 2.4.2+.

This has become necessary because the bug is rather difficult to 
isolate and therefore impossible to work around reliably.

We do understand that this may cause difficulties for some people, 
who have been relying on packaged binary versions of Mono. Version 
2.4.2 is recent enough to have no binary packages, so it will be 
necessary to build Mono from source. However, we feel it is 
unavoidable at this time, as we can't recommend or endorse a Mono 
version that we know to contain a showstopper bug.

On the upside, 2.4.2 has much better performance and stability, 
compared to 2.0.1.

Melanie