Filter vanished file warnings from both stdout and stderr

Versions of rsync before 3.0 wrote warnings to stdout. The behavior
was changed to write to stderr in 3.0 but we support versions going
back to 2.6.4.

Author: rtomayko

libexec/ghe-rsync

@@ -7,11 +7,13 @@
 
 set -o pipefail
 
-# Filter vanished file warnings from stderr. The complex redirections are
-# necessary to filter stderr while also keeping stdout and stderr separated.
+# Filter vanished file warnings from both stdout (rsync versions < 3.x) and
+# stderr (rsync versions >= 3.x). The complex redirections are necessary to
+# filter stderr while also keeping stdout and stderr separated.
 IGNOREOUT='^(file has vanished: |rsync warning: some files vanished before they could be transferred)'
 (rsync "${@}" 3>&1 1>&2 2>&3 3>&- |
-  (egrep -v "$IGNOREOUT" || true)) 3>&1 1>&2 2>&3 3>&-
+  (egrep -v "$IGNOREOUT" || true)) 3>&1 1>&2 2>&3 3>&- |
+  (egrep -v "$IGNOREOUT" || true)
 res=$?
 
 # rsync exits with 24 when vanished files are detected.