bind: use http:// instead of ftp:// for site

To avoid issues with firewalls blocking ftp.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 771bb2d58d945ebd2909dc8ca5cccf30f189c581)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bind/bind.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 BIND_VERSION = 9.11.2
-BIND_SITE = ftp://ftp.isc.org/isc/bind9/$(BIND_VERSION)
+BIND_SITE = http://ftp.isc.org/isc/bind9/$(BIND_VERSION)
 # bind does not support parallel builds.
 BIND_MAKE = $(MAKE1)
 BIND_INSTALL_STAGING = YES