* cygmagic: Add define name to warning.

* dcrt0.cc (_dll_crt0): Check for changes in child_info size.
(multiple_cygwin_problem): Avoid "proc" errors when testing.  Just assume new
cygwin proc.
* shared_info.h (mount_info): Add 'cb' element for sanity checks.
(shared_info): Ditto.
* child_info.h (child_info): Add fhandler_union_size element for sanity
checking.
* shared.cc (open_shared): Detect shared region size mismatch between parent
and child.
(shared_info::initialize): Detect shared region size mismatch with expectation.
(memory_Init): Ditto.
* sigproc.cc (init_child_info): Correctly set cb in passed structure.
* shared.cc (open_shared):

winsup/cygwin/cygmagic

@@ -14,7 +14,7 @@ while [ -n "$1" ]; do
     echo "#define $define $sum"
     curr=`sed -n "s/^#[ 	]*define CURR_$define[ 	][ 	]*\([^ 	][^ 	]*\)/\1/p" $file`
     [ "$curr" == "$sum" ] || echo "*** WARNING WARNING WARNING WARNING WARNING ***
-*** $file: magic number changed old $curr != new $sum
+*** $file: magic number for $define changed old $curr != new $sum
 *** WARNING WARNING WARNING WARNING WARNING ***" 1>&2
 done >> $file_magic
 exit 0