* spawn.cc (find_exec): Accept a PATH-like string in place of an environment

variable.
* dlfcn.cc (get_full_path_of_dll): Search /usr/bin (for windows compatibility)
and /usr/lib (for UNIX compatibility) when looking for shared libraries.
* environ.cc (conv_envvars): Put back LD_LIBRARY_PATH since it is used by
get_full_path_of_dll().
* errno.cc (errmap): Map MOD_NOT_FOUND to ENOENT.
* cygmagic: Remove debugging cruft.

winsup/cygwin/cygmagic

@@ -24,7 +24,7 @@ sumit() {
 while [ -n "$1" ]; do
     define=$1; shift
     struct=$1; shift
-    sum=`$gcc -E $file | tee /tmp/1 | sed -n "/^$struct/,/^};/p" | sed -e 's/[ 	]//g' -e '/^$/d' | tee /tmp/2 | sumit | tee /tmp/3 | awk '{printf "0x%xU", $1}'`
+    sum=`$gcc -E $file | sed -n "/^$struct/,/^};/p" | sed -e 's/[ 	]//g' -e '/^$/d' | sumit | tee /tmp/3 | awk '{printf "0x%xU", $1}'`
     echo "#define $define $sum"
     curr=`sed -n "s/^#[ 	]*define CURR_$define[ 	][ 	]*\([^ 	][^ 	]*\)/\1/p" $file`
     [ "$curr" != "$sum" ] && echo "*** WARNING WARNING WARNING WARNING WARNING ***