Unofficial Patch for OpenSim 0.6.8

Contents of corrections.

1) Fall to the hell
The phenomenon of avatar's falling to the hell is corrected at the boundary of SIM and
empty region.
However, there is a possibility of not operating normally in the Combine mode.

2) When MySQL is used, the bug which the attached object comes off at the next log in is corrected.
When SQLite is used, the same bug occurs. But this is problem of SQLite. Even if this patch is
applied, it is not corrected.

3) The message that the version of SIM is different only because OS is different is displayed.
It is modified that information of OS is not put in Version information.
If revision number of SVN cannot be acquired accurately, please write the revision number to bin/svn_revision file.

4) Emergency Position
The phenomenon of jump to Emergency Position (127,127,127) at SIM boundary is evaded.
But this is not Bug.

5) Avatar is caught at SIM boundary between some seconds
Caught of avatar between some seconds is canceled at SIM boundary.
But this is not Bug.