Moderate: keepalived security and bug fix update (Oracle Linux 7)

[1.3.5-16]
- Rework previous misc_script/vrrp_script patch (#1667292)

[1.3.5-15]
- Rework previous checker comparison patch (#1715308)

[1.3.5-14]
- Make checker variables non global (#1715308)

[1.3.5-13]
- Fix comparison of checkers on reload (#1715308)

[1.3.5-12]
- Fix build errors (#1678480)

[1.3.5-11]
- Fix problems with health checks & real servers after reload/restart (#1678480)

[1.3.5-10]
- Fix vrrp_script and check_misc scripts of type '</dev/tcp/127.0.0.1/80' (#1667292)

[1.3.5-9]
- Fix improper pathname validation (#1654301)