* Makefile.am (MPH_UNIX_SOURCE): Add syslog.c.

	* Makefile.am (MPH_UNIX_SOURCE): Add syslog.c.
	* dirent.c, grp.c, pwd.c, signal.c, stdio.c, stdlib.c: Wrap functions which
	  return `void' so that they instead: (1) return `int', (2) clear errno
	  before calling the real function, and (3) return -1 if errno changed.
	  This must be done in native code because calling
	  Stdlib.SetLastError/Syscall.xxx
	  from managed code won't work reliably (since errno may change between the
	  SetLastError call and the actual Syscall invocation).
	* unistd.c: Same as above, and allow fpathconf(3), pathconf(3), sysconf(3),
	  and confstr(3) callers to explicitly choose their own errno value.
	* map.c, map.h: Handle enumeration name change in Mono.Unix.Native
	  (e.g. ConfStr --> ConfstrName, etc.).  This is so that they follow the
	  established naming conventions.
	* map-icalls.h: Add new icalls.
	* syslog.c: Added; wraps <syslog.h> functions.

svn path=/trunk/mono/; revision=51711