Output request logic (PRINT ; PLOT ; PARAM,POST)

[victorkemp]

Existing behavior (v19.0.0):

• Output requests with PRINT alone go to the F06 only;
• Output requests with PLOT alone go to the OP2 only;
• Output requests without specifiers go to both the F06 and OP2;
• PARAM,POST<= 0: all supported output requests go to FEMAP NEU.
• PARAM,PRTNEU,YES: all supported output requests go to FEMAP NEU.

Proposed behavior:

• Output requests with PRINT alone go to F06;
• Output requests with PLOT alone do not go to F06;
• Output requests without specifiers go to F06 because PRINT is the default;
• Output requests both PRINT and PLOT go to F06 because the default (PRINT) overrides the contradictory specifier (PLOT);
• PARAM,POST,-1: all output requests go to OP2 regardless of PRINT/PLOT.
• PARAM,PRTNEU,YES: all supported output requests go to FEMAP NEU. (no change)

Decision making discussion:
https://discord.com/channels/1018042673669623853/1520534425979326576