Console: Limit share portion to 90%

We want the part. traffic RED dropper to have some effect
and not let traffic back up at the router bandwidth
limiter and into the UDP-Sender queue,
as it removes any room for client and router traffic,
and throws the router into high message delay mode.

apps/routerconsole/java/src/net/i2p/router/web/helpers/ConfigNetHelper.java

@@ -349,7 +349,7 @@ public class ConfigNetHelper extends HelperBase {
         StringBuilder buf = new StringBuilder(256);
         buf.append("<select style=\"text-align: right !important;\" name=\"sharePercentage\">\n");
         boolean found = false;
-        for (int i = 100; i >= -5; i -= 5) {
+        for (int i = 90; i >= -5; i -= 5) {
             int val = i;
             if (i == -5) {
                 if (found)