Enhance quotactl decoding

* quota.c (sys_quotactl): Decode 2nd syscall argument using printpath.
* pathtrace.c (pathtrace_match): Add quotactl support.
* linux/*/syscallent.h: Add TF flag to quotactl entry.
diff --git a/quota.c b/quota.c
index a1fd92d..780abf9 100644
--- a/quota.c
+++ b/quota.c
@@ -617,7 +617,7 @@
 		tprints("|");
 		printxval(quotatypes, type, "???QUOTA");
 		tprints(", ");
-		printstr(tcp, tcp->u_arg[1], -1);
+		printpath(tcp, tcp->u_arg[1]);
 		tprints(", ");
 		switch (cmd) {
 			case Q_V1_QUOTAON: