main/bind: use relative dirs in scripts

In preperation for apk3's --force-no-chroot option

main/bind/APKBUILD

@@ -10,7 +10,7 @@ _ver=${pkgver%_p*}
 _p=${pkgver#*_p}
 _major=${pkgver%%.*}
 [ "$_p" != "$pkgver" ] && _ver="$_ver-P$_p"
-pkgrel=0
+pkgrel=1
 pkgdesc="The ISC DNS server"
 url="https://www.isc.org/"
 arch="all"

main/bind/bind.post-install

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # Generate key required for reload to work -> creates /etc/bind/rndc.key
-if ! [ -f /etc/bind/rndc.key ]; then
-	rndc-confgen -a
-	chown named:named /etc/bind/rndc.key
+if ! [ -f etc/bind/rndc.key ]; then
+	rndc-confgen -a -c etc/bind/rndc.key
+	chown named:named etc/bind/rndc.key
 fi