[rancid] Patch for xrancid Extreme x480 - oscillating "show configuration"

[Howard Jones]

Here's a tiny patch to stop spurious diffs on (at least) Extreme x480
switches. For some reason they sometimes do and sometimes don't show the
"show configuration" command in the output.

--- xrancid 2015-05-08 16:43:09.001709176 +0100
+++ ../../bin/xrancid 2016-01-18 10:03:56.175776121 +0000
@@ -357,6 +357,14 @@
/# system name/i && next;
/# software version/i && next;

+ # if there's a show configuration (sometimes is, sometimes
isn't, even on one device!)
+ # remove it, and the following line (a blank comment)
+ if (m/^show\sconfiguration/) {
+ <INPUT>;
+ next;
+ }
+
+
if (/((create|configure) account \S+ \S+) / && $filter_pwds >= 2) {
ProcessHistory("COMMENTS","keysort","H0","# $1 <key
removed>\n");
next;