http://www.example.com this line should never be modified
this link should be injected
this custom link should be injected
this link should be injected, and marker substituted
mailto link should still work
HTML entities encoded mailto link should still work
###unknown_field_will_be_kept###
###newsletter_view_url###
###newsletter_unsubscribe_url###
###email###
###my_custom_field###
http://unknown_field_will_be_kept
http://newsletter_view_url
http://newsletter_unsubscribe_url
http://email
http://my_custom_field
https://unknown_field_will_be_kept
https://newsletter_view_url
https://newsletter_unsubscribe_url
https://email
https://my_custom_field
boolean_false=###:IF: boolean_false ###true-ish###:ENDIF:###
boolean_true=###:IF: boolean_true ###true-ish###:ENDIF:###
integer_false=###:IF: integer_false ###true-ish###:ENDIF:###
integer_true=###:IF: integer_true ###true-ish###:ENDIF:###
string_false=###:IF: string_false ###true-ish###:ENDIF:###
string_true=###:IF: string_true ###true-ish###:ENDIF:###
boolean_false=###:IF: boolean_false ###true-ish###:ELSE:###false-ish###:ENDIF:###
boolean_true=###:IF: boolean_true ###true-ish###:ELSE:###false-ish###:ENDIF:###
integer_false=###:IF: integer_false ###true-ish###:ELSE:###false-ish###:ENDIF:###
integer_true=###:IF: integer_true ###true-ish###:ELSE:###false-ish###:ENDIF:###
string_false=###:IF: string_false ###true-ish###:ELSE:###false-ish###:ENDIF:###
string_true=###:IF: string_true ###true-ish###:ELSE:###false-ish###:ENDIF:###