Implement getCommittedVirtualMemorySize() directly using sysctl
kern.proc.vmmap
Implement getOpenFileDescriptorCount() directly using sysctl
kern.proc.nfds

Note on openjdk17 use closefrom where possible (note this use case is
only in openjdk 17, 21, 23 and 24)

Remove the message about the use of fdescfs(5) as this is not needed
for sure, keep the information about procfs(5) as I have not analysed
enough the source code to make sure it is not used anywhere else, but
I don't think it is.

Printf was confused because the argument was used as format string
and contained a %.
The issue is only cosmetical so not bumping port revision.

It is mentioned in the PR that an upstream fix is in openjdk25.

PR:	287053
Approved by:	java@

Building java/openjdk{19,20,21} with lld 17 results in the following link errors:

  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZ21WB_HandshakeWalkStackE16TraceSelfClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZ24WB_HandshakeReadMonitorsE19ReadMonitorsClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZ26WB_AsyncHandshakeWalkStackE16TraceSelfClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZL20reinitialize_itablesvE18ReinitTableClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN12JvmtiEnvBase27check_for_periodic_clean_upEvE28ThreadInsideIterationClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN15G1RemSetSummary6updateEvE11CollectData' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN16SATBMarkQueueSet22set_active_all_threadsEbbE22SetThreadActiveClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN16SATBMarkQueueSet23abandon_partial_markingEvE25AbandonThreadQueueClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN18G1ConcurrentRefine30get_and_reset_refinement_statsEvE12CollectStats' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN19G1DirtyCardQueueSet12abandon_logsEvE23AbandonThreadLogClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN19G1DirtyCardQueueSet16concatenate_logsEvE27ConcatenateThreadLogClosure' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN19G1DirtyCardQueueSet30get_and_reset_refinement_statsEvE12CollectStats' failed: symbol not defined
  ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN7Threads25change_thread_claim_tokenEvE11ResetClaims' failed: symbol not defined

This is because lld 17 defaults to errors when undefined symbols are
referenced in linker version scripts. The problem is due to the Makefile
JvmMapfile.gmk, which generates a linker version script. It uses "nm
--defined-only" to dump symbols in object files, but this also includes
local (hidden) symbols. Add "--extern-only" to make it only dump global
symbols.

PR:		276425
Approved by:	otis (mentor), dim
MFH:		2024Q1
Differential Revision:	https://reviews.freebsd.org/D43620

- Remove all references to defunct ARCH arm
- Remove all references to defunct ARCH sparc64
- Remove x11-drivers/xf86-video-sunffb which requires defunct sparc64
  ARCH
- Remove sysutils/afbinit requires defunct sparc64 ARCH
- Remove all references to bktr driver
- Remove all references to defunct FreeBSD_12
- Remove all references to OSVERSION/OSREL corresponding to 12
- Remove conditionals in Mk/Uses/cabal.mk
- Remove sparc reference from Mk/Uses/qt-dist.mk
- Remove BROKEN_sparc64/NOT_FOR_ARCH=sparc64
- Remove BROKEN_FreeBSD_12* from:
- Remove OpenSSL patches from:
- Remove conditional flags for OSVERSION >= 1300000 to fixed flags.
  Also move conditional flags for non sparc64/arm ARCH to fixed flags.

Reviewed by:	brooks, jbeich, rene, salvadore
Differential Revision: https://reviews.freebsd.org/D42068