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/miscfuncs.cc

@@ -217,14 +217,14 @@ is_cp_multibyte (UINT cp)
 
 /* OMYGOD!  CharNextExA is not UTF-8 aware!  It only works fine with
    double byte charsets.  So we have to do it ourselves for UTF-8.
-   
+
    While being at it, we do more.  If a double-byte or multibyte
    sequence is truncated due to an early end, we need a way to recognize
    it.  The reason is that multiple buffered write statements might
    accidentally stop and start in the middle of a single character byte
    sequence.  If we have to interpret the byte sequences (as in
    fhandler_console), we would print wrong output in these cases.
-   
+
    So we have four possible return values here:
 
    ret = end      if str >= end
@@ -249,7 +249,7 @@ next_char (UINT cp, const unsigned char *str, const unsigned char *end)
     case 950:
     case 1361:
       if (*str <= 0x7f)
-        ret = str + 1;
+	ret = str + 1;
       else if (str == end - 1 && IsDBCSLeadByteEx (cp, *str))
 	ret = str;
       else