Perform whitespace cleanup throughout.

* dcrt0.cc (signal_shift_subtract): Eliminate ancient backwards compatibility.
(check_sanity_and_sync): Ditto.
* winsup.h (SIGTOMASK): Ditto.  Just use constant in signal calculation.
* include/cygwin/version: Remove backwards signal mask compatibility define.
* path.cc (symlink_info::check_sysfile): Cosmetic change.
* registry.cc (get_registry_hive_path): Remove unneeded variable.
* exceptions.cc (handle_sigsuspend): Eliminate thread signal mask and use
either main sigmask or current thread sigmask.
(set_process_mask): Ditto.
(sighold): Ditto.
(sigrelse): Ditto.
(sigset): Ditto.
(set_process_mask_delta): Ditto.
(_cygtls::call_signal_handler): Ditto.
* fhandler_process.cc (format_process_status): Ditto.
* fhandler_termios.cc (fhandler_termios::bg_check): Ditto.
* pinfo.h (class pinfo): Ditto.
* select.cc (pselect): Ditto.
* signal.cc (sigprocmask): Ditto.
(abort): Ditto.
(sigpause): Ditto.
(sigsend): Ditto.
(wait_sig): Ditto.
* thread.h (pthread::parent_tls): New member.
* thread.cc (pthread::pthread): Record parent_tls here.
(pthread::thread_init_wrapper): Initialize sigmask from parent thread.

winsup/cygwin/include/sys/stdio.h

@@ -20,15 +20,15 @@ details. */
 #if !defined(__SINGLE_THREAD__)
 #  if !defined(_flockfile)
 #    define _flockfile(fp) ({ if (!((fp)->_flags & __SSTR)) \
-                  __cygwin_lock_lock ((_LOCK_T *)&(fp)->_lock); })
+		  __cygwin_lock_lock ((_LOCK_T *)&(fp)->_lock); })
 #  endif
 #  if !defined(_ftrylockfile)
 #    define _ftrylockfile(fp) (((fp)->_flags & __SSTR) ? 0 : \
-                  __cygwin_lock_trylock ((_LOCK_T *)&(fp)->_lock))
+		  __cygwin_lock_trylock ((_LOCK_T *)&(fp)->_lock))
 #  endif
 #  if !defined(_funlockfile)
 #    define _funlockfile(fp) ({ if (!((fp)->_flags & __SSTR)) \
-                  __cygwin_lock_unlock ((_LOCK_T *)&(fp)->_lock); })
+		  __cygwin_lock_unlock ((_LOCK_T *)&(fp)->_lock); })
 #  endif
 #endif