RFR: JDK-8260335: [macos] Running app using relative path causes problems [v2]

[Andy Herrick]

> Fixing FileUtils.dirname() to skip over "/.".

Andy Herrick has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 86 additional commits since the last revision:

 - Merge branch 'master' into JDK-8260335
 - JDK-8260335: [macos] Running app using relative path causes problems
 - 8260522: Clean up warnings in hotspot JTReg runtime tests
   
   Reviewed-by: lfoltan, coleenp
 - 8259398: Super word not applied to a loop with byteArrayViewVarHandle
   
   Reviewed-by: vlivanov, thartmann, chagedorn
 - 8260669: Missing quotes in fixpath.sh
   
   Reviewed-by: tbell, iris, mikael, ihse
 - 8259814: test/jdk/tools/jlink/plugins/CompressorPluginTest.java has compilation issues
   
   Reviewed-by: alanb
 - 8257498: Remove useless skeleton predicates
   
   Reviewed-by: roland, thartmann
 - 8260591: Shenandoah: improve parallelism for concurrent thread root scans
   
   Reviewed-by: zgu, rkennke
 - 8259395: Patching automatic module with additional packages re-creates module without "requires java.base"
   
   Reviewed-by: attila, alanb
 - 8260577: Unused code in AbstractCompiler after Shark compiler removal
   
   Reviewed-by: shade, chagedorn, kvn
 - ... and 76 more: https://git.openjdk.java.net/jdk/compare/957d77d4...af31a50b

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2260/files
  - new: https://git.openjdk.java.net/jdk/pull/2260/files/6b5bfb28..af31a50b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2260&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2260&range=00-01

  Stats: 24100 lines in 487 files changed: 8803 ins; 6126 del; 9171 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2260.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2260/head:pull/2260

PR: https://git.openjdk.java.net/jdk/pull/2260