io-layer: Fix process helper functions for Haiku

io-layer: Fix process helper functions for Haiku

Haiku has neither makedev nor /proc. Enumerate processes, process modules
and retrieve the process name via Kernel Kit. Fixes build on Haiku.

Adjust _WAPI_PROCESS_UNHANDLED_PID_MASK to cope with Haiku's 32-bit pid_t.
Fixes exception trying to obtain the ProcessName of pids >= 2^15.

  Be did not have /proc
  For Mono to build without
  Resort to Be's root
                         -- Andreas F.

	* processes.c (EnumProcesses, load_modules): Add implementations
	for Haiku. Fixes build on Haiku.
	(OpenProcess, EnumProcessModules, get_process_name_from_proc):
	Tweak implementations for Haiku.
	* process-private.h: Fix _WAPI_PROCESS_UNHANDLED_PID_MASK for
	32-bit pids (Haiku).
	* ChangeLog: Fix UTF-8 encoding

v4 -> v5:
* Resolve conflicts with more OpenBSD changes.

v3 -> v4:
* Rebase against OpenBSD changes.

v2 -> v3:
* Fix get_process_name_from_proc implementation to use get_next_image_info.
* Add new implementation of EnumProcesses.
* Fix OpenProcess' check whether pid is available.
* Fix _WAPI_PROCESS_UNHANDLED_PID_MASK to handle Haiku's 32-bit pid_t.
* Fix module addresses in load_modules by considering the text segment, too.
  Suggested by Ingo Weinhold.
* Add ChangeLog entry, fix file encoding.

v1 -> v2:
* Instead of providing a dummy makedev macro, avoid its use.
* Don't try to parse /proc.
* Add new implementations of load_modules and get_process_name_from_proc
  based on libroot's Kernel Kit, suggested by François Revol.

This commit is licensed under the MIT X11 license;
the Haiku poem is licensed under the CC Attribution 3.0 license.

svn path=/trunk/mono/; revision=155191