bash-completion: Build from actual shell script templates.

At some point, the Makefile was inerrantly modified so that it
generated manpage sources instead of shell script, making completions
very screwed up.

man/bash-completion/Makefile.am

@@ -17,28 +17,27 @@ BASH_COMPLETION_SCRIPTLETS = \
 bashcompletion_DATA = $(BASH_COMPLETION_SCRIPTLETS)
 CLEANFILES = $(BASH_COMPLETION_SCRIPTLETS)
 
-MANDIR = $(top_srcdir)/man
-DOCGEN = $(MANDIR)/docgen
+DOCGEN = $(top_srcdir)/man/docgen
 DOCGEN_COMMON_ARGS = -n "@PROGRAM_SPREFIX@" -s "@PACKAGE_NAME@" -z "@PACKAGE_SHORTNAME@"
 
 @PROGRAM_PREFIX@doom: $(top_srcdir)/src $(DOCGEN) $(BASH_COMPLETION_TEMPLATES)
 	$(DOCGEN) $(DOCGEN_COMMON_ARGS) \
-                  -g doom -b $(MANDIR)/doom.template \
+                  -g doom -b doom.template \
                   $(top_srcdir)/src $(top_srcdir)/src/doom > $@
 
 @PROGRAM_PREFIX@heretic: $(top_srcdir)/src $(DOCGEN) $(BASH_COMPLETION_TEMPLATES)
 	$(DOCGEN) $(DOCGEN_COMMON_ARGS) \
-                  -g heretic -b $(MANDIR)/heretic.template \
+                  -g heretic -b heretic.template \
                   $(top_srcdir)/src $(top_srcdir)/src/heretic > $@
 
 @PROGRAM_PREFIX@hexen: $(top_srcdir)/src $(DOCGEN) $(BASH_COMPLETION_TEMPLATES)
 	$(DOCGEN) $(DOCGEN_COMMON_ARGS) \
-                  -g hexen -b $(MANDIR)/hexen.template \
+                  -g hexen -b hexen.template \
                   $(top_srcdir)/src $(top_srcdir)/src/hexen > $@
 
 @PROGRAM_PREFIX@strife: $(top_srcdir)/src $(DOCGEN) $(BASH_COMPLETION_TEMPLATES)
 	$(DOCGEN) $(DOCGEN_COMMON_ARGS) \
-                  -g strife -b $(MANDIR)/strife.template \
+                  -g strife -b strife.template \
                   $(top_srcdir)/src $(top_srcdir)/src/strife > $@
 
 EXTRA_DIST = \