Fix for Sed Injection Vulnerability

Thanks to @hestiacp and @jaapmarcus for fix.

bin/v-change-sys-config-value

@@ -28,6 +28,7 @@ PATH="$PATH:/usr/local/sbin:/sbin:/usr/sbin:/root/bin"
 check_args '2' "$#" 'KEY VALUE'
 is_format_valid 'key'
 
+format_no_quotes "$value" 'value'
 
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