Allow cross-site use of the status script.

Also a random header change, and adjust cache frequency.

collects/meta/build/build

@@ -1056,7 +1056,7 @@ MAIN_BUILD() {
   fi
 
   if is_yes make_bins; then
-    header -s "Creating archive"
+    header -s "Creating source archive"
     _cd "$maindir"
     _rm "$repotgz"
     _cd "$maindir/$cleandir"

collects/meta/build/current-build-status.cgi

@@ -2,12 +2,12 @@
 cache="/tmp/racket-build-status-cache"
 cachelock="$cache-lock"
 
-printf 'Content-type: text/plain\r\n\r\n'
+printf 'Content-type: text/plain\r\nAccess-Control-Allow-Origin: *\r\n\r\n'
 
 # cache status reports (avoids excessive work during builds)
 
 # use a lockfile as a cheap hack to time cache refreshing
-if ! lockfile -r 0 -l 30 -s 0 "$cachelock" >& /dev/null \
+if ! lockfile -r 0 -l 25 -s 0 "$cachelock" >& /dev/null \
    && [[ -e "$cache" ]]; then
   cat "$cache"; exit
 fi