[MiNT] booting and _mint_setenv

[Standa Opichal <opichals@seznam.cz>]

Hi Frank!

I've had quite big problems recently when updating my CVS tree.

I got stuck during the system boot in reading the mint.cnf and setting 
the initial environment using the 'setenv' directives. I noticed that 
Frank did something about this. I went to debug this and realized that 
mint.prg iherites its default process p_env pointer from TOS (IIRC) and 
therefore the total size of the base environment can't be longer that 
say 128 bytes. Also the CVSROOT/sys/init.c:_mint_setenv() uses the 
RAM_PAD() macro which definitely fails on pointers not allocated with 
the MiNT's internal alloc function.

I solved this for myself so that the _mint_setenv() actually allocs the 
environment when called for the first time. I assume this as a temporary 
hack and I think the mint.prg should allocate its own chunk (like any 
other process) and copy the environment from TOS into that. With that 
the _mint_setenv() doesn't need to be changed and would look fine. Frank?

regards

STan