RFR: Mutex 06 semaphore

[Michael Mirwaldt]

I think Mutex_06_Semaphore is missing because many concurrent algorithms use semaphores as mutexes.

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Commit messages:
 - Merge branch 'openjdk:master' into Mutex_06_Semaphore
 - added initial draft of Mutex_06_Semaphore for a PR
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge remote-tracking branch 'origin/master'
 - Merge remote-tracking branch 'origin/master'
 - Next try to fix user name of author
 - 5 more samples for mutex algorithms
 - Changed user name and email
 - ... and 3 more: https://git.openjdk.java.net/jcstress/compare/14e33063...aa996d97

Changes: https://git.openjdk.java.net/jcstress/pull/95/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jcstress&pr=95&range=00
  Stats: 74 lines in 1 file changed: 74 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/95.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/95/head:pull/95

PR: https://git.openjdk.java.net/jcstress/pull/95