v1.7.1

ABI summary:

• mirclient ABI unchanged at 9
• miral ABI unchanged at 3
• mirserver ABI unchanged at 53
• mircommon ABI unchanged at 7
• mirplatform ABI unchanged at 17
• mirprotobuf ABI unchanged at 3
• mirplatformgraphics ABI unchanged to 16
• mirclientplatform ABI unchanged at 5
• mirinputplatform ABI unchanged at 7
• mircore ABI unchanged at 1
• mircookie ABI unchanged at 2

Enhancements:

• [X11] Lots of improvements to Xwayland & X11 window managment
• [X11] X11 support is no longer "experimental" (--enable-x11 replaces --x11-display-experimental )
• [X11] add --x11-displayfd option
• [miral] Make app launch environment configurable. (Fixes: #1268)
• [miral] Add ExternalClientLauncher::launch_using_x11()
• [demos] Simplify miral-app script and make terminal logic more robust
• [demos] Add "Mir Shell" to greeter
• [demos] Install Wayland dependences via Debian "Recommends"
• Tell Java toolkits that we're a non-reparenting window manager

Bugs fixed:

• [X11] Lots of fixes to Xwayland & X11 window managment code
• [miral] Occasionally input locks when launching apps. (#1218)
• Fix FTBFS with g++-10. (Fixes: #1259)
• Correct logic to locate gmock when gtest has package configuration. (Fixes: #1228)
• Fix FTBFS caused by GTest deprecation of INSTANTIATE_TEST_CASE_P
• Use ByteSizeLong instead of deprecated ByteSize. (Fixes #1127)
• Fix unnecessary copies in range-for loops (Clang-11 fixes)