Clarify sharedinstall comment
diff --git a/Modules/Setup.in b/Modules/Setup.in
index e24e1f3..d652240 100644
--- a/Modules/Setup.in
+++ b/Modules/Setup.in
@@ -39,8 +39,9 @@
# added to the linker options, but rules to create their .o files and
# their shared libraries will still be added to the Makefile, and
# their names will be collected in the Make variable SHAREDMODS. This
-# is used to build modules as shared libraries. (They must be
-# installed using "make sharedinstall".) (For compatibility,
+# is used to build modules as shared libraries. (They can be
+# installed using "make sharedinstall", which is implied by the
+# toplevel "make install" target.) (For compatibility,
# *noconfig* has the same effect as *shared*.)
# NOTE: As a standard policy, as many modules as can be supported by a