====== GNU C compiler: Adding #include statements ======

recently, g++ has stopped to include some standard headers automatically. To make old code compile again, just include those headers manually. But: which ones do we need?

**NOTE:** ''<header>'' is usually different from ''<header.h>'' !

  #include <string.h>    // strcmp(), strstr(), strlen(),  memcpy(), memset()
  #include <stdint.h>    // uint32_t, uint16_t, uint8_t
  #include <stdlib.h>    // malloc(), free(), abort(),     atoi(), atol()
  
  #include <sys/types.h> // uint, ulong