keepalived security and bug fix update

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