added libminiupnpc-dev to CircleCI build

fix miniupnpc typo in features.mk

made UPnP port mapping enabled by default

See merge request STJr/SRB2!2251

change HAVE_MINIUPNPC to NOUPNP

disable uPnP in Debian stable musl

made UPnP port mapping enabled by default
lowered UPnP Discover delay from 2000 ms to 500 ms
only look for first InternetGatewayDevice found
remove UPnP port mapping on shutdown

add libminiupnpc-dev to the build

update miniUPnPc function calls to API version 17
update include statements for miniUPnPcc
use PKGCONFIG to find lib and inc forminiUPnPc

remove miniupnc block

added NOEXECINFO to cMake

add NOEXECINFO=1 to make

GitLabCI: use new builder image, srb2ci

See merge request STJr/SRB2!2237

Master Server API v1 URL change

See merge request STJr/SRB2!2226

add compnote support to comptime

I_SetSongTrack(int) should be I_SetSongTrack(INT32)

See merge request STJr/SRB2!2213

https://mb.srb2.org is now behind CloudFlare, and the Master Server API v1 can not be accessed for some users due to this change. so I setup a new dual stack DNS record for accessing to the API

Fix a "maybe-uninitialized" compiler warning

See merge request STJr/SRB2!2145

Fixup ARM64 build

Limit builds to just "Windows x86" and "Debian stable:amd64", all other builds can be started manually

Update .gitlab-ci.yml file

See merge request STJr/SRB2!2186

Add ARM64=1 for arm build