fix #3500 (broken jni_wrappCommands.awk)
Revert "disable Enumerations.java until awk script is fixed for mawk"

This reverts commit 0529ae3d23a601d26caf08e05148ef70b1195e15.
Merge remote-tracking branch 'origin/release' into develop
fix some cases of units getting perma-stuck (s.t. even spammed user orders cannot free them) on terrain
update pr-downloader: static link curl
Fix bug in a788363
Try to find out why MT+OMP still conflict
removed the engine poll-system for speedcontrol ( notice, this is NOT user manual speed adjust, this is how game speed is adjusted according to the player's load )
made the command host-only, and changed so it only controls current game, it doesn't change saved value
while the system allowed the host to override the poll, the whole code is redundant with authosts poll system
moreover, only few players were aware of the command, making it a "secret poll"
to further make the situation worse, according to each player's personal saved preference, as players join/leaved the server, speed control mechanism changed
now that the command is host only, autohosts can reimplement the poll to adjust server speed control on top of their normal poll framework if they wish to
it should only be a couple of lines, which will also have more flexibility about user permissions and poll params
they should also use the normal config mechanism to set the default speed control policy
Change the default speed control mode to Average CPU
keep average speed control as default, but do that by remapping 0 config to 1 instead of 2, this way:
it's compatible with clients with old settings
if in future more speed control policies are added, default can be easily remapped with 1-line change
small mistake: meant to remap speedcontrol 0 (default ) to 1 (average ), not 2 ( max )
Update rts/Game/GameServer.cpp

Fix remappedSpeedCtrl
removed remapping code for speedcontrol, now 0 means max and 1 means average
added description to the config variable
reverted back default value for speedcontrol to 1 to use engine's default config system
fix #3510 (insane armbrawl range)
Merge branch 'release' into develop
fix "nuke opens w/o stockpile ready"
remove dead code
pr-downloader: fix linking with openssl
fix #3489 (default trees not obeying featureLoS rules)
un-duplicate *TreeDrawer::TreeSquareStruct