Update to v2.2:

New: Allow for the value of other entries to be in the 'sed' command of a
       filter. (May break existing configurations in cases where sed command
       uses a '%'.)

bin/BBlog

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-## Copyright Ian Jauslin 2015-2022
+## Copyright Ian Jauslin 2015-2023
 ## 
 ## Licensed under the Apache License, Version 2.0 (the "License");
 ## you may not use this file except in compliance with the License.
@@ -18,7 +18,7 @@
 enginedir=/usr/share/BBlog/engines
 
 # version
-version=2.1.5
+version=2.2
 
 function print_config {
   echo "engine: $engine"
@@ -222,7 +222,8 @@ function replace_format {
 
     # apply filter
     if [ -n "$filter" ]; then
-      sed_cmd=$(eval "echo \$filter_$filter")
+      # replace '%' inside filter text
+      sed_cmd=$(replace_format $(eval "echo \$filter_$filter"))
       replacement=$(eval "echo \$$field" | sed -r "$sed_cmd" )
     else
       replacement=$(eval "echo \$$field")