INN ships a modified install-sh file, with support for the new -B option,
but dh_autoreconf replaces it with the original one from libtool.

This patch makes it stop using the -B option, which is meaningless anyway
when building a package since there is nothing to backup.

--- a/Makefile.global.in
+++ b/Makefile.global.in
@@ -340,7 +340,7 @@ INSTALL		= $(top)/support/install-sh -p
 ##  files like active and newsgroups that should have the same permissions as
 ##  article files.
 
-BACKUP_OPTION	= -S .OLD
+BACKUP_OPTION	=
 
 LI_SPRI		= $(LIBTOOLINST) $(INSTALL) -o root -g $(RUNASGROUP) -m 4550 $(BACKUP_OPTION)
 LI_XPRI		= $(LIBTOOLINST) $(INSTALL) $(OWNER) -m 0550 $(BACKUP_OPTION)
