[ANNOUNCE] Changes to the build system: Env.Host.sh is dead so is the need to source the environment

[Ivan Timofeev]

>> * 'make' does not run autogen.sh automatically after 'make clean'
> why would autogen.sh be necessarily ran after a make clean ? make
> clean is not suppose to remove config_host.mk or any configure.in
> generated file.

Oops, now all work fine, the first time I cleaned the tree and then ran 
'make' it gave me an error, I do not remember what it said, it was 
something like '/gbuild/gbuild.mk not found'...

Anyway, now it is not reproducible.

Ivan