RFR: 8364822: Comment cleanup, stale references to closeDescriptors and UNIXProcess.c [v2]

[Guanqiang Han]

> Clean up some stale comment references.  Trivial changes.

Guanqiang Han has updated the pull request incrementally with one additional commit since the last revision:

  Update os_linux.cpp
  
  a small fix

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26667/files
  - new: https://git.openjdk.org/jdk/pull/26667/files/0c7ef910..3b55134c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26667&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26667&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26667.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26667/head:pull/26667

PR: https://git.openjdk.org/jdk/pull/26667