Merge

8216039: TLS with BC and RSASSA-PSS breaks ECDHServerKeyExchange Summary: Add internal Signature init methods to select provider based on both key and parameter Reviewed-by: xuelei

8221853: Data race in compile broker (set_last_compile) Summary: Remove the debug code provoking it Reviewed-by: kvn, thartmann

8221430: StringBuffer(CharSequence) constructor truncates when -XX:-CompactStrings specified Reviewed-by: igerasim, rriggs Contributed-by: Andrew Leonard <andrew_m_leonard@uk.ibm.com>, Ivan Gerasimov <ivan.gerasimov@oracle.com>

8222229: ProblemList compiler/jsr292/InvokerSignatureMismatch.java Reviewed-by: iignatyev

8222227: Shenandoah: Fix Traversal GC weak roots handling in final-traversal pause Reviewed-by: shade, zgu

8222186: Shenandoah should not uncommit below minimum heap size Reviewed-by: zgu, rkennke

8222185: Shenandoah should report "committed" as capacity Reviewed-by: zgu, rkennke

8221852: SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE should be selected at runtime, not build time Reviewed-by: alanb, shade

8221924: get(null) on single-entry unmodifiable Map returns null instead of throwing NPE Reviewed-by: redestad, lancea

8221658: aarch64: add necessary predicate for ubfx patterns Reviewed-by: aph

8221894: Add comments for docker tests in the test doc Reviewed-by: erikj, dholmes

8020637: Permissions.readObject doesn't enforce proper Class to PermissionCollection mappings Reviewed-by: weijun

8222144: BuiltinClassLoader should create the CodeSource for jrt URLs lazily Reviewed-by: alanb

8221535: add steal tick related information to hs_error file [linux] Reviewed-by: dholmes, goetz