* AppDomainSetup.cs: If configuration file is not an absolute path,

* AppDomainSetup.cs: If configuration file is not an absolute path,
then throw a MemberAccessException if ApplicationBase is not set,
or otherwise consider it as a path relative to ApplicationBase.
Fixes bug #80934. Patch provided by Jamie Cansdale.
* AppDomain.cs: In CreateDomain, construct AppDomain with
ApplicationBase of default domain if not explicitly set in specified
AppDomainSetup. If config file is not set, then use filename of the
default domain config file. Base on patch provided by Jamie Cansdale.
* AppDomainSetupTest.cs: Added tests for bug #80934.
* AppDomainTest.cs: Added tests for bug #80934.

svn path=/trunk/mcs/; revision=73402