patch 8.1.1785: map functionality mixed with character input

Problem:    Map functionality mixed with character input.
Solution:   Move the map functionality to a separate file. (Yegappan
            Lakshmanan, closes #4740)  Graduate the +localmap feature.
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 04cdd08..6b6d073 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -745,6 +745,7 @@
 	$(OUTDIR)\json.obj \
 	$(OUTDIR)\list.obj \
 	$(OUTDIR)\main.obj \
+	$(OUTDIR)\map.obj \
 	$(OUTDIR)\mark.obj \
 	$(OUTDIR)\mbyte.obj \
 	$(OUTDIR)\memfile.obj \
@@ -1556,6 +1557,8 @@
 
 $(OUTDIR)/main.obj:	$(OUTDIR) main.c  $(INCL) $(CUI_INCL)
 
+$(OUTDIR)/map.obj:	$(OUTDIR) map.c  $(INCL)
+
 $(OUTDIR)/mark.obj:	$(OUTDIR) mark.c  $(INCL)
 
 $(OUTDIR)/memfile.obj:	$(OUTDIR) memfile.c  $(INCL)
@@ -1769,6 +1772,7 @@
 	proto/json.pro \
 	proto/list.pro \
 	proto/main.pro \
+	proto/map.pro \
 	proto/mark.pro \
 	proto/memfile.pro \
 	proto/memline.pro \