RFR: 8265271: JFR: Allow use of .jfc options when starting JFR [v4]

[Erik Gahlin]

> Hi,
> 
> Could I have a review that makes it possible to specify event setting and .jfc options on command line (-XX:StartFlightRecoding) and jcmd (JFR.start). There are still a couple of issues to fix, so the correct information is returned for the DiagnosticMXBean, but plan is to add it soon and hopefully be able to check it in for JDK 17.
> 
> Thanks
> Erik

Erik Gahlin has updated the pull request incrementally with one additional commit since the last revision:

  Reviewer feedback

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4414/files
  - new: https://git.openjdk.java.net/jdk/pull/4414/files/8126a61a..44e1338f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4414&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4414&range=02-03

  Stats: 8 lines in 3 files changed: 1 ins; 2 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4414.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4414/head:pull/4414

PR: https://git.openjdk.java.net/jdk/pull/4414