Bug#1140113: hobbit-plugins: kern: kernel version regex broken for versions containing "+" (e.g. 6.12.90+deb13.1-amd64)

[David Fogarty]

Package: hobbit-plugins
Version: 20230301
Severity: normal
Tags: patch
There's a problem with /usr/lib/xymon/client/ext/kern from the 
"hobbit-plugins".  The test is using grep -E and Debian 13 ships kernel 
versions with "+" in them (f.e. '6.12.90+deb13.1-amd64').  This breaks the 
regex, but quotemeta() first would fix it.

55a56
    my $kernel_image_release_escaped = quotemeta($kernel_image_release);
57c58
<         " | grep -E '^$kernel_image_release|^Linux version '";
---
        " | grep -E '^$kernel_image_release_escaped|^Linux version '";