Variables starting with `o' in linuxdoom

• okay src/changelog:88
• once src/p_spec.h:243
• one src/r_segs.c:197
• OOP src/doomdef.h:108
• openbottom src/p_local.h:169
• openrange src/p_local.h:170
• opentop src/p_local.h:168
• optional src/w_wad.c:126
• or src/p_maputl.c:107
• org src/readme.b:20
• orientation src/r_draw.c:490
• Otherwise src/s_sound.c:750
• overflowsprite src/r_things.c:326