… libretro port:

- cl_shownet
- developer
- entities
- mcache
- host_framerate
- host_speeds
- maplist
- d_subdiv16
- hunk
* Get rid of PARANOID ifdefs - never used and speed-sapping according to own internal
comments
* Keys - get rid of console autocompletion - will never be used
* Get rid of useless window_visible - libretro port doesn't need to have a concept of this
* Get rid of useless onscreen logging functionality like R_TimeRefresh, R_TimeGraph, R_ZGraph, etc.
* Get rid of Con_DPrintf - only ever used when developer switch is set, which will never
be the case for the libretro port
* Get rid of debuglog

of alternate r_pixbytes codepaths - less conditionals, less code

never change from this, remove all alternate code paths

* Remove some unused variables/command variables
* Simplify audio code - shm->samples will always be constant, so use
a constant define. Plan to eventually get rid of shm struct/pointer
(see comment in snd_dma/snd_mix.c code that this should be removed eventually)

…fcache_s)

* Remove unneeded low floating point/high floating point mode setting (this was
only ever relevant on old 486/Pentium era CPUs)
* Get rid of more useless debug functions
* Direct initialization of local variables where possible

…el_prev,

viewmodel_next, version

* draworder always 0, remove conditional
* Random miscellaneous cleanups, make functions static if we can

from now on to core options

* Get rid of r_vars.c

* Use strlcpy where possible instead of snprintf
* Get rid of 'bad CDRIP'warning whenever an audio track cannot be found