Allow more characters as part of 'lynis configure settings' command

include/functions

@@ -3052,11 +3052,11 @@
 
     SafeInput() {
         exitcode=1
-        # By default remove only control characters
+        # By default remove only special or undefined characters
         if [ $# -eq 1 ]; then
             input="$1"
-            # cleaned=$(echo ${input} | tr -d '[:cntrl:]')
-            cleaned=$(echo "$input" | sed 's/[^a-zA-Z0-9_-]//g')
+            # Allow only a common set of characters in first parameter
+            cleaned=$(echo "$input" | sed 's/[^a-zA-Z0-9\._:=-]//g')
         # If know what to test against, then see if input matches the specified class
         elif [ $# -eq 2 ]; then
             input="$1"
@@ -3065,7 +3065,7 @@
         else
             ExitFatal "No argument or too many arguments provided to SafeInput()"
         fi
-
+        # Test if the cleaned string is the same as the original input
         if [ "${cleaned}" = "${input}" ]; then
             exitcode=0
         fi