[PATCH] support make DESTDIR=/... install

[Rafael Garcia-Suarez]

This fixes installing to a different DESTDIR.

Index: Makefile.PL
===================================================================
--- Makefile.PL (revision 1233)
+++ Makefile.PL (working copy)
@@ -105,10 +105,10 @@
 
 pure_site_install ::
        \$(NOECHO) \$(MOD_INSTALL) \\
-               \$(INST6_LIB) $config->{privlib} \\
-               \$(INST6_ARCHLIB) $config->{archlib} \\
-               \$(INST6_BIN) $config->{installbin} \\
-               \$(INST6_SCRIPT) $config->{installscript} \\
+               \$(INST6_LIB) \$(DESTDIR)$config->{privlib} \\
+               \$(INST6_ARCHLIB) \$(DESTDIR)$config->{archlib} \\
+               \$(INST6_BIN) \$(DESTDIR)$config->{installbin} \\
+               \$(INST6_SCRIPT) \$(DESTDIR)$config->{installscript} \\
                \$(INST6_MAN1DIR) \$(DESTINSTALLMAN1DIR) \\
                \$(INST6_MAN3DIR) \$(DESTINSTALLMAN3DIR)
 .
End.