Fix echo $$ | cat
#if and config option cleanup
Fix let evaluation of null/unset vars
alloc improvement
Fix accidental SCCS keywords
Fix Xstring overwriting in lex.c
Print here doc temp file when printing I/O actions
Add more slack on end of Xstrings
Fix up test(1) parsing
Run shell scripts with EXECSHELL
Make temp files 0600
Make unset -f work
Make trailing blank or tab in alias work
Fix command completion bug
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Fix "cd / foo"
Fix getopts accidentally resetting itself
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Fix whence exit codes
