beremiz

Add support for Modbus (TCP and RTU) working as master & slave
int CheckRetainBuffer(void)
{
return 1;
}
void ValidateRetainBuffer(void)
{
}
void InValidateRetainBuffer(void)
{
}
void Retain(unsigned int offset, unsigned int count, void *p)
{
}
void Remind(unsigned int offset, unsigned int count, void *p)
{
}