Merge mingwrt-3.22.4 updates into 5.0-active branch.

diff --cc .hgtags
Simple merge

diff --cc mingwrt/ChangeLog
index 9bea175,ccc3a63..217d325
--- 1/mingwrt/ChangeLog
--- 2/mingwrt/ChangeLog
+++ b/mingwrt/ChangeLog
@@@ -1,26 -1,19 +1,49 @@@
++2016-10-18  Keith Marshall  <keithmarshall@users.sourceforge.net>
++
++      Merge mingwrt-3.22.4 updates into 5.0-active branch.
++
++      * configure.ac: Preserve original 5.0-active state.
++      * include/wchar.h: Update per 2016-10-17 commits.
++
+ 2016-10-17  Keith Marshall  <keithmarshall@users.sourceforge.net>
+ 
+       Prepare and tag mingwrt-3.22.4 patch release.
+ 
+       * configure.ac (AC_INIT): Increment patch level.
+ 
+ 2016-10-17  Keith Marshall  <keithmarshall@users.sourceforge.net>
+ 
+       Resolve an ANSI mode <string.h> vs. <wchar.h> conflict.
+ 
+       * include/wchar.h [!(_WCHAR_H && _STRING_H)]: Change condition...
+       [!(_WCHAR_H && (_STRING_H && !__STRICT_ANSI__))]: ...to this; the
+       guarded declarations are not exposed by including <string.h> when...
+       [__STRICT_ANSI__]: ...this is defined; hence, we must declare them
+       when including <wchar.h>, even after including <string.h>
+ 
 +2016-10-14  Keith Marshall  <keithmarshall@users.sourceforge.net>
 +
 +      Add dependency tracking for tests/Makefile.
 +
 +      * tests/Makefile.in (top_builddir): Define it.
 +      (Makefile): Add automatic rebuild rule, tracking both srcdir and
 +      top_builddir prerequisite changes.
 +
 +2016-10-14  Keith Marshall  <keithmarshall@users.sourceforge.net>
 +
 +      Correct a minor typographic error.
 +
 +      * tests/atlocal.in (autoconf_input): Replace invalid AC_SUBST tag...
 +      (configure_input): ...with this correctly named alternative.
 +
 +2016-10-14  Keith Marshall  <keithmarshall@users.sourceforge.net>
 +
 +      Merge mingwrt-3.22.3 updates into 5.0-active branch.
 +
 +      * configure.ac: Preserve original 5.0-active state.
 +      * include/_mingw.h.in include/string.h include/sys/types.h
 +      * include/io.h: Update per 2016-10-13 commits.
 +
  2016-10-13  Keith Marshall  <keithmarshall@users.sourceforge.net>
  
        Prepare and tag mingwrt-3.22.3 patch release.