Change behavior of -O0 and -O1 for backward compatibility
Change behavior of -O0 and -O1 for backward compatibility

-O0: JMP default to NEAR, Jcc/LOOP/JCXZ default to SHORT.
      In other words, this is reverting to full-blown 0.98 behavior, not
      0.98.39.
-O1: JMP and Jcc default to NEAR, LOOP/JCXZ default to SHORT (only
      possible form).

turingstudio/nasm,letolabs/nasm,techkey/nasm,Distrotech/nasm,projedi/nasm,projedi/nasm,turingstudio/nasm,projedi/nasm,turingstudio/nasm,techkey/nasm,turingstudio/nasm,projedi/nasm,techkey/nasm,techkey/nasm,projedi/nasm,letolabs/nasm,Distrotech/nasm,techkey/nasm,Distrotech/nasm,Distrotech/nasm,letolabs/nasm