Codechange: rename str_validate to StrMakeValid(InPlace) (#9304)

This to be more explicit the function changes the value, and not
returns yes/no.

src/network/core/packet.cpp

@@ -394,7 +394,7 @@ void Packet::Recv_string(char *buffer, size_t size, StringValidationSettings set
 	assert(pos <= std::numeric_limits<PacketSize>::max());
 	this->pos = static_cast<PacketSize>(pos);
 
-	str_validate(bufp, last, settings);
+	StrMakeValidInPlace(bufp, last, settings);
 }
 
 /**
@@ -423,7 +423,7 @@ std::string Packet::Recv_string(size_t length, StringValidationSettings settings
 		while (this->Recv_uint8() != '\0') {}
 	}
 
-	return str_validate(str, settings);
+	return StrMakeValid(str, settings);
 }
 
 /**