RFR: 8236569: -Xss not multiple of 4K does not work for the main thread on macOS [v2]

[Adam Sotona]

> This is continuation of PR #4256 
> 
> The patch simply rounds up the specified stack size to multiple of the system page size, on systems where necessary.
> The patch is based on the original PR/branch, with reflected remaining recommendations.
> 
> Please review.
> 
> Thank you,
> Adam

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  Updated Java mannpage

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8953/files
  - new: https://git.openjdk.java.net/jdk/pull/8953/files/d082aed0..7712f700

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8953&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8953&range=00-01

  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8953.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8953/head:pull/8953

PR: https://git.openjdk.java.net/jdk/pull/8953