- especially for plmn_list, will allow to be followed by an MCC/MNC in a
  single line
- tightens regexes to match replacements more accurately, e.g., "val =
  key" (instead of just searching for "key)
- no special rule for SD, which matches SD values (and not the SD
  field). However, currently it is not possible to specify multiple SDs
  (multiple SSTs was already not possible)