Abstract can-we-set-{control,addresses} checks
Macros for i386_dr_low_get_{addr,status,control}
s/inf_state/state/g in i386-low.c
Macros for i386_dr_low_set_{addr,control} too
Refactor this #ifdef GDBSERVER...#else...#endif block
s/DR_SIZE/DR_LENGTH/g (I may regret this)
Add STATE parameter to i386-nat.c's i386_update_inferior_debug_regs
More (final?) comment merges