https://github.com/OpenRA/OpenRA/issues/2564

fixed a issue with pinging Master-server

Sometimes initial TickCount is less than zero, so (Environment.TickCount - lastPing) can be less than "MasterPingInterval * 1000". That's why PingMasterServer() is not calling for a long time until somebody connected.
cnc-structure sequences tickrate fixed

Strucutre animations were too fast in many cases. These values seem to match up correctly to C&C 95.

Obelisk - Have not yet fixed (will do so when I fix how it fires)
SAM site - Someone may later decide to speed up how fast it pops up, for gameplay purposes
Merge pull request #2701 from psydev/patch-49

[cnc] structure sequences tick-rates corrected
Merge pull request #2684 from xaionaro/bleed

fixed a issue with pinging Master-server
Fixed #2696: Sequences: Allow stride to be specified.

This allows you to use just some of the frames of an animation
which has multiple facings.

For example, if you have an animation which has 8 facings, and 6 frames
of animation per facing, but you only want to show 3 of them, you can now do:

    Facings: 8
    Length: 3       # the number of frames in each facing to actually use
    Stride: 6       # the number of frames per facing present in the SHP

If Stride is not specified, it defaults to Length, which is the old behavior.
It is an error to specify a stride less than the length -- this would produce
overlapping facings, or weirder.