Implement the get_time() function

doc/17-library-reference.md

@@ -17,6 +17,7 @@ random()                        | Returns a random value between 0 and RAND_MAX
 log(value)                      | Writes a message to the log. Non-string values are converted to a JSON string.
 log(severity, facility, value)  | Writes a message to the log. `severity` can be one of `LogDebug`, `LogNotice`, `LogInformation`, `LogWarning`, and `LogCritical`. Non-string values are converted to a JSON string.
 typeof(value)                   | Returns the type object for a value.
+get_time()                      | Returns the current UNIX timestamp.
 exit(integer)                   | Terminates the application.
 
 ## <a id="object-accessor-functions"></a> Object Accessor Functions

lib/base/scriptutils.cpp

@@ -51,6 +51,7 @@ REGISTER_SCRIPTFUNCTION(assert, &ScriptUtils::Assert);
 REGISTER_SCRIPTFUNCTION(string, &ScriptUtils::CastString);
 REGISTER_SCRIPTFUNCTION(number, &ScriptUtils::CastNumber);
 REGISTER_SCRIPTFUNCTION(bool, &ScriptUtils::CastBool);
+REGISTER_SCRIPTFUNCTION(get_time, &Utility::GetTime);
 
 String ScriptUtils::CastString(const Value& value)
 {