PrBoom-Plus 2.6.2

• added a prospective fix for OpenGL rendering: don't bleed walls through sky floors
• account for proper crosshair offsets when locked on to monsters
• relaxed "IWAD tag not present" error to a warning, which allows loading REKKR IWAD
• fixed processing of multiple DEHs
• UMAPINFO: fixed error reporting if token == TK_NoToken
• fixed intermission screen for E0Mx
• fixed Alt+Tabbing on Windows, broken in new SDL2 version
• UMAPINFO: fixed using_FMI reset * no more crashes at textscreens
  (e.g. after MAP06, MAP11 or MAP20) after viewing finale picture upon finishing
  a level with UMAPINFO 'endpic' property
• fixed freezing at TITLEPIC while using mousewheel in menus
• fixed looping forever in G_NextWeapon()
• UMAPINFO: fix 'entering' and 'enterpic' shown on exit levels
• GL: adjust sky offsets for non-standard FOVs
• fixed stuttering with uncapped framerate
• added support for widescreen low resolutions
• added REKKR to launcher string list
• let G_GotoNextLevel() close the circle for maps with an endpic
• Launcher: identify IWADs either by IWAD tag, or by PWAD tag and matching filename
• Portmidi: fix freeze after song change
• fixed scaled time interpolation when changing game speed
• fixed wrong pitch of SFX when MIDI Player is set to SDL
• v1.2 compat:
  • do not use sfx_getpow for powerups
  • do not render powerups and attacking Spiderdemon fullbright
• UMAPINFO: fixed par times not showing
• fixed demo playback warp consistency
• added SKILL cheat to display current skill level
• fixed calculation of interpolation frac value
• guard against screen buffer underflow
• fixed crash at startup by properly closing IWAD file handle
• added vanilla_keymap option à la Chocolate Doom
• added 'run' as a mouse-settable control (mouseb_speed)