Fix the MS-DOS build due to changes in configury.

 config.bat: Remove white space around "+" in COPY commands.
 msods/mainmake.v2 (version): Use emacs_version[] in src/emacs.c
 instead of lisp/version.el (see revno 100306).
 msdos/sed1v2.inp (MKDEPDIR): Edit to empty.
 Delete lines in rules that invoke $(MKDEPDIR).
 Fix editing rules that begin with "cd ../lisp".
 Edit out sh if-then-else-fi constructs that test ${CANNOT_DUMP}.
 Edit out "|| exit ;\" constructs in emacs${EXEEXT} rule.