legacy flag removal

[Antoine Martin]

Flags that have been available by default since before 1.0
We can therefore assume that all clients / servers have support for it without checking.

• window.configure.pointer - was 0.17 onwards

More to be added later.

Also switches that are no longer needed, ie:

• XPRA_OSX_FOCUS_WORKAROUND (see r21007)

[Antoine Martin]

Milestone renamed

[Antoine Martin]

• r23852 removes XPRA_OSX_FOCUS_WORKAROUND
• r23853 assume that the server has the "window.configure.pointer" feature (0.17 or later)
• r13854 assume that the server has the ogg latency fix
• r23855 "sound_sequence"
• r23856 "ogg-latency-fix" and "eos-sequence"
• r23857 "auto-video-encoding"
• r23859 "enable-selections"
• r23860 "change-quality", "change-min-quality", "change-speed", "change-min-speed"
• r23861 + r23862 "encoding.generic"
• r23863 "toggle_keyboard_sync"
• r23864 "notify-startup-complete", "toggle_cursors_bell_notify", "xsettings-tuple", "event_request", "notify-startup-complete", "server-events"
• r23865 + r23875 add docstring showing version information for flags
• r23866 "window_refresh_config"
• r23867 "window-filters", "window_unmap", "suspend-resume", "window.configure.skip-geometry"
• r23868 "clipboard.set_enabled"
• r23869 "generic-rgb-encodings"
• r23870 encoding: "flush", "client_options" and "csc_atoms"
• r23871 "video_scaling"
• r23872 "encoding.rgb24zlib", "webp_leaks", "rgb24zlib"
• r23873 "window.raise", "window.initiate-moveresize", "raw_window_icons", "encoding.csc_atoms", "initiate-moveresize", "generic_window_types", "server-window-move-resize", "server-window-resize", "wants_default_cursor"
• r23874 "window.decorations"

[Antoine Martin]

Updates:

• r23878 "info-namespace"
• r23879 "key_repeat_modifiers"