fix showcsr https://github.com/Neilpang/acme.sh/issues/1968

acme.sh

@@ -1134,12 +1134,17 @@ _readSubjectAltNamesFromCSR() {
 
   if _contains "$_dnsAltnames," "DNS:$_csrsubj,"; then
     _debug "AltNames contains subject"
-    _dnsAltnames="$(printf "%s" "$_dnsAltnames," | sed "s/DNS:$_csrsubj,//g")"
+    _excapedAlgnames="$(echo "$_dnsAltnames" | tr '*' '#')"
+    _debug _excapedAlgnames "$_excapedAlgnames"
+    _escapedSubject="$(echo "$_csrsubj" | tr '*' '#')"
+    _debug _escapedSubject "$_escapedSubject"
+    _dnsAltnames="$(echo "$_excapedAlgnames," | sed "s/DNS:$_escapedSubject,//g" | tr '#' '*' | sed "s/,\$//g")"
+    _debug _dnsAltnames "$_dnsAltnames"
   else
     _debug "AltNames doesn't contain subject"
   fi
 
-  printf "%s" "$_dnsAltnames" | sed "s/DNS://g"
+  echo "$_dnsAltnames" | sed "s/DNS://g"
 }
 
 #_csrfile