allx now runs all up to three (rather than two) times to eliminate

bootstrap failures after small changes like the recent change to
procedure names, so we don't have to rebuild the boot files as often.
  Mf-base

original commit: 94aaebe54807780791b8373017c979f59e6c45f1

LOG

@@ -967,3 +967,7 @@
     expeditor.c
 - Adjust cp0 to not replace a procedure name from a let wrapper
     cp0.ss, misc.ms
+- allx now runs all up to three (rather than two) times to eliminate
+  bootstrap failures after small changes like the recent change to
+  procedure names, so we don't have to rebuild the boot files as often.
+    Mf-base

s/Mf-base

@@ -158,15 +158,19 @@ doit: ${PetiteBoot} ${SchemeBoot} ${Cheader} ${Cequates}
 # faster when most of the targets need to be recompiled.
 all: bootall ${Cheader} ${Cequates}
 
-# allx runs all up to two times and checks to see if the new boot file is the
+# allx runs all up to three times and checks to see if the new boot file is the
 # same as the last, i.e., the system is properly bootstrapped.
 allx: prettyclean saveboot
 	$(MAKE) all
 	if $(MAKE) checkboot; then echo fine ; else\
-	  $(MAKE) prettyclean saveboot &&\
-	  $(MAKE) all &&\
-	  $(MAKE) checkboot ;\
-	fi
+          $(MAKE) prettyclean saveboot &&\
+          $(MAKE) all &&\
+          if $(MAKE) checkboot; then echo fine ; else\
+            $(MAKE) prettyclean saveboot &&\
+            $(MAKE) all &&\
+            $(MAKE) checkboot ;\
+          fi\
+        fi
 	$(MAKE) restoreboot
 ifneq ($(OS),Windows_NT)
 	$(MAKE) resetbootlinks