Sector portals

See merge request !2139

Fix roll braking assuming player angle is camera angle (resolves #1055)

Closes #1055

See merge request STJr/SRB2!2053

Drop Debian musl jobs

Conditional jump or move depends on uninitialised value(s)
strncpy (vg_replace_strmem.c:599)
MIT_SetCurBackground (m_menu.c:2650)
M_IterateMenuTree (m_menu.c:2581)
M_SetMenuCurBackground (m_menu.c:2790)
F_InitMenuPresValues (f_finale.c:2276)
D_StartTitle (d_main.c:998)
G_Responder (g_game.c:2117)
D_ProcessEvents (d_main.c:282)
Local_Maketic (d_clisrv.c:5297)
NetUpdate (d_clisrv.c:5701)
TryRunTics (d_clisrv.c:5371)
D_SRB2Loop (d_main.c:820)

doomdef.h: check if the build system already define our DEBUG code
version.mk: do not fail on our inline functions in DEBUGMODE
features.mk: we do not need the VALGRIND libraies, just the headers
mserv.c: start registered with false in Update_parameters()

added libminiupnpc-dev to CircleCI build

Fix a -Winline warning

See merge request STJr/SRB2!2255

Expose P_ResetCamera / camera->reset to Lua

See merge request STJr/SRB2!2009

This reverts merge request !1551

Fix #1166

Closes #1166

See merge request STJr/SRB2!2256

Update player->quittime while a Server is Idling, Attempt 2

Closes #1143 and #1119

See merge request STJr/SRB2!2254

Only Consider ExitLevel a Cheat When Used to Cheat

See merge request STJr/SRB2!2159

Add "allowflip" Parameter to P_DoJump

See merge request STJr/SRB2!2158

fix miniupnpc typo in features.mk

Raise the skin limit

See merge request STJr/SRB2!1466

OpenGL: Fix linedef type 10 not culling FOFs (Closes #438)

Closes #438

See merge request STJr/SRB2!1399

Make Dead / NoClipHeight Objects Immune to Death Pits (Resolves #553)

Closes #553

See merge request STJr/SRB2!2001

Copy Interpolation to Shields and Overlays, Splitscreen Overlays

Closes #997

See merge request STJr/SRB2!1992

Expose P_IsLocalPlayer to Lua

See merge request STJr/SRB2!1997

Rewrite M_DrawStaticBox

Closes #1014

See merge request STJr/SRB2!1990

Always Allow con_hudlines when Using devmode

See merge request STJr/SRB2!1987

Made filesearch aware of symbolic links

See merge request STJr/SRB2!1976

Update mobj floorz/ceilingz after a bustable FOF is destroyed

See merge request STJr/SRB2!1945

Implement perfstats options for LUAh_PreThinkFrame and LUAh_PostThinkFrame

See merge request STJr/SRB2!1932

Add transparency flag support to drawFill

See merge request STJr/SRB2!1881