func-tests: update README

tests-extra/README

@@ -3,11 +3,12 @@ Prerequisites:
 Python >=3.3
 python3-dnspython >=1.11.1
 psutil (sudo pip3 install psutil)
-dnssec-keygen
 dnssec-signzone
+dnssec-keygen
 dnssec-verify
-Bind 9.9
+Bind 9.9.x
 lsof
+(valgrind)
 (gdb)
 
 Ubuntu:
@@ -16,7 +17,7 @@ Disable apparmor protection for system Bind:
 # sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.named
 
 Allow ptrace:
-echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
+# echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
 or
-/etc/sysctl.d/10-ptrace.conf
+change file /etc/sysctl.d/10-ptrace.conf
 kernel.yama.ptrace_scope = 0