Cosmetics: address cppcheck warnings on src/actions

src/actions/disruptive/allow.h

@@ -53,7 +53,7 @@ enum AllowType : int {
 
 class Allow : public Action {
  public:
-    explicit Allow(std::string action)
+    explicit Allow(const std::string &action) 
         : Action(action, RunTimeOnlyIfMatchKind),
         m_allowType(NoneAllowType) { }
 

src/actions/disruptive/deny.h

@@ -31,7 +31,7 @@ namespace disruptive {
 
 class Deny : public Action {
  public:
-    explicit Deny(std::string action) : Action(action) { }
+    explicit Deny(const std::string &action) : Action(action) { }
 
     bool evaluate(Rule *rule, Transaction *transaction,
         std::shared_ptr<RuleMessage> rm) override;

src/actions/disruptive/drop.h

@@ -31,7 +31,7 @@ namespace disruptive {
 
 class Drop : public Action {
  public:
-    explicit Drop(std::string action) : Action(action) { }
+    explicit Drop(const std::string &action) : Action(action) { }
 
     bool evaluate(Rule *rule, Transaction *transaction,
         std::shared_ptr<RuleMessage> rm) override;

src/actions/disruptive/pass.h

@@ -29,7 +29,7 @@ namespace disruptive {
 
 class Pass : public Action {
  public:
-    explicit Pass(std::string action) : Action(action) { }
+    explicit Pass(const std::string &action) : Action(action) { }
 
     bool evaluate(Rule *rule, Transaction *transaction,
         std::shared_ptr<RuleMessage> rm) override;

src/actions/disruptive/redirect.h

@@ -38,10 +38,12 @@ class Redirect : public Action {
  public:
     explicit Redirect(const std::string &action)
         : Action(action, RunTimeOnlyIfMatchKind),
-        m_status(0) { }
+        m_status(0),
+        m_string(nullptr) { }
 
     explicit Redirect(std::unique_ptr<RunTimeString> z)
         : Action("redirert", RunTimeOnlyIfMatchKind),
+            m_status(0),
             m_string(std::move(z)) { }
 
     bool evaluate(Rule *rule, Transaction *transaction,