Make helper return string_view and constexpr

Author: nycrat

src/software/networking/udp/network_utils.cpp

@@ -2,7 +2,7 @@
 
 #include <arpa/inet.h>
 
-std::string getLoopbackInterfaceName()
+constexpr std::string_view getLoopbackInterfaceName()
 {
 #ifdef __APPLE__
     return "lo0";

src/software/networking/udp/network_utils.h

@@ -4,13 +4,14 @@
 
 #include <optional>
 #include <string>
+#include <string_view>
 
 /**
  * Get the name of the loopback network interface for the current platform.
  *
  * @return the loopback interface name for the current platform
  */
-std::string getLoopbackInterfaceName();
+constexpr std::string_view getLoopbackInterfaceName();
 
 /**
  * Given an interface, get the IP address associated with that interface