tgt: update to 1.0.79

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>

net/tgt/files/tgt.config

@@ -4,6 +4,7 @@ config options 'tgt'
 	option iothreads '2'
 #	option nop_count '3'
 #	option nop_interval '1'
+#	option logging '0'
 #	list portal '[::1]'
 #	list portal '127.0.0.1:3261'
 #	list portal '0.0.0.0:3262'

net/tgt/files/tgt.init

@@ -184,16 +184,20 @@ validate_tgt_section() {
 		'iothreads:uinteger' \
 		'portal:list(string)' \
 		'nop_interval:uinteger' \
-		'nop_count:uinteger'
+		'nop_count:uinteger' \
+		'logging:bool:0'
 }
 
 start_tgt_instance() {
+	local fg_flag=-f
 	[ "$2" = 0 ] || {
 		$logger "Validation failed for tgt options"
 		return 1
 	}
 	procd_open_instance
-	procd_set_param command $PROG -f
+	procd_set_param command $PROG
+	[ "$logging" -eq 1 ] && fg_flag=-D
+	procd_append_param command "$fg_flag"
 	[ "$iothreads" ] && procd_append_param command -t "$iothreads"
 	[ "$portal$nop_interval$nop_count" ] && {
 		local iscsi="" i