Replace 'ram_block' with 'vfs_block'

Issue #3781.

repos/gems/run/leitzentrale.run

@@ -23,7 +23,7 @@ import_from_depot [depot_user]/src/[base_src] \
                   [depot_user]/src/rom_filter \
                   [depot_user]/src/terminal \
                   [depot_user]/src/posix \
-                  [depot_user]/src/ram_block \
+                  [depot_user]/src/vfs_block \
                   [depot_user]/src/part_block \
                   [depot_user]/src/rump \
                   [depot_user]/src/ncurses \
@@ -225,10 +225,19 @@ install_config {
 	</start>
 
 	<start name="ahci-2">
-		<binary name="ram_block"/>
+		<binary name="vfs_block"/>
 		<resource name="RAM" quantum="10M"/>
-		<config nofile="ahci-1.img" size="8M" block_size="512"/>
 		<provides> <service name="Block"/> </provides>
+		<config>
+			<vfs>
+				<ram/>
+				<import>
+					<zero name="block_file" size="8M"/>
+				</import>
+			</vfs>
+			<default-policy file="/block_file" block_size="512"
+			                writeable="yes"/>
+		</config>
 	</start>
 
 	<start name="leitzentrale" caps="2300">