Set_Variable, Export, etc.) to new ones (ReadVariableGS, SetGS, ExportGS,
etc.) in many places; there are still a few more to change. This change
removed the 256-character limit on strings retrieved by these routines,
such as the value of environment variables. (PR # 9).
At startup do not set $TERM to gnocon if it is already set.
Removed the df command (from builtin.asm).
Defined macro incad to increment a 4-byte address, checking for overflow;
replaced instances of "inc ptr" with "incad ptr".
Changed column offset table to use a 1-word rather than 1-byte entry. This
resolves PR#14 (hash wouldn't print beyond first 256 filenames).
Fixed defect in unalias (alias.asm) where the double quote portion of the
scanner would look for a terminating single quote. This resolves PR#69.
Changed default order for copying files in $PATH dirs into executable list,
so earlier paths files are found first.
Added environment variable flag $OLDPATHMODE to make gsh behave in the old
(backwards order) way when necessary.
Discard duplicate filenames when hashing.
Fix PR#73: directory in $PATH with escaped space (\ ) is not searched.
d534981038