Merge pull request #1377 from konstruktoid/issue1376

support perf_event_paranoid=4

default.prf

@@ -197,7 +197,7 @@ config-data=sysctl;kernel.exec-shield;1;1;No description;sysctl -a;url:https;//k
 config-data=sysctl;kernel.kptr_restrict;2;1;Restrict access to kernel symbols;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.maps_protect;1;1;Restrict access to /proc/[pid]/maps;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.modules_disabled;1;1;Restrict module loading once this sysctl value is loaded;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
-config-data=sysctl;kernel.perf_event_paranoid;2|3;1;Restrict unprivileged access to the perf_event_open() system call.;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
+config-data=sysctl;kernel.perf_event_paranoid;2|3|4;1;Restrict unprivileged access to the perf_event_open() system call.;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.randomize_va_space;2;1;Randomize of memory address locations (ASLR);sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.suid_dumpable;0;1;Restrict core dumps;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;
 config-data=sysctl;kernel.sysrq;0;1;Disable magic SysRQ;sysctl -a;url:https;//kernel.org/doc/Documentation/sysctl/kernel.txt;category:security;