add sh/dx origin and ip and regexes

See help show/ddx for more information

A regex for alpha fields for filters, Regexes are indicated by surrounding
the pattern required with { and } e.g {\d+\s*db\s+\d+\s*wpm(?:\s+cq)?} But, in this case,
the 'set/badword' mechanism is probably more robust.

This is an experimental feature that may well not work...