[Opensim-dev] test .net4.8 and vs2019/mono 6.10

[Leal Duarte]

Hi

    -  for those with .net4.8 and vs2019 on windows installed i added 
runprebuild19.bat

         this will create a solution only valid to vs2019, main opensim 
sources will be compiled against .net4.8 API using vs2019 last compile 
version ( version 16)

     - for those on linux with at least mono 6.10 ( didn't test other 
versions) runprebuild19.sh will do identical for mono.

> this is basicly a test to see how our current main sources hold on the 
> migration path from 4.6 to 4.8
- be very carefull when changing from 4.6 to 4.8 targets and vice versa. 
Make sure you do clean the solution before runprebuild*, even better 
just to it on clean pull folders.

since it seems to work fine, there should be no reason why advanced 
users ( that may not mean you!! :p ) can't use the supposed better new 
compilers.

Main opensim will stay on 4.6 because many still have old machines with 
old tools. So all patchs etc should still only use up to c# 6 specs.

(

note about use of var: that is a dumb thing to use, use only when the 
right side explicit tells the type

ok:

var tmp = new List<potatos>(32);

Not Ok;

var tmp = MyNiceThing();

)

regards,

Ubit