PKG XtraDB Cluster 5.6.34 sed error with proxy-protocol-networks (or any other option with a "/" in it)

We're using `proxy-protocol-networks` with XtraDB Cluster, and mysqld_safe now throws an error on startup due to a sed invocation using / as the delimiter.

our config includes the following line (with real addresses)

    proxy_protocol_networks=a:b:c:d::/126, a:b:c:e::/128, a:b:c:f::/128

The fix is to apply the diff below to mysqld_safe:

--- /usr/bin/mysqld_safe-orig 2016-12-27 21:07:58.600018909 +0000
+++ /usr/bin/mysqld_safe 2016-12-27 21:14:14.960407758 +0000
@@ -303,14 +303,14 @@

   for arg do
     # the parameter after "=", or the whole $arg if no match
     val=`echo "$arg" | sed -e 's;^--[^=]*=;;'`
     # what's before "=", or the whole $arg if no match
- optname=`echo "$arg" | sed -e 's/^\(--[^=]*\)=.*$/\1/'`
+ optname=`echo "$arg" | sed -e 's;^\(--[^=]*\)=.*$;\1;'`
     # replace "_" by "-" ; mysqld_safe must accept "_" like mysqld does.
     optname_subst=`echo "$optname" | sed 's/_/-/g'`
- arg=`echo $arg | sed "s/^$optname/$optname_subst/"`
+ arg=`echo $arg | sed "s;^$optname;$optname_subst;"`
     case "$arg" in
       # these get passed explicitly to mysqld
       --basedir=*) MY_BASEDIR_VERSION="$val" ;;
       --datadir=*) DATADIR="$val" ;;
       --pid-file=*) pid_file="$val" ;;