ENH/TST: more samples and rejection types for sender verify fail and rejected RCPT
ENH: make groupings non-capturing
ENH: remove temporary failures from local_scan in line with comments in gh-258
TST: url reference fix
ENH: split out exim-spam into speparate filter
ENH: Split log and provide jail examples
DOC: ChangeLog for exim-spam.conf filter  and tabs->spaces in changelog
DOC: ChangeLog confict