web/username_prefix.php: user2path(): added support for comment prefixes, which can be used to include term categories. note: when URL is used without http:// , you must include a non-letter in the comment (eg. c_:x@url) to work in Firefox.

web/username_prefix.php: user2path(): visually separated steps for easier readability

fix: schemas/VegBIEN/VegBIEN data dictionary.xlsx: updated: restored "" that had been stripped out when the data was pasted in. set column widths to fit on a laptop screen.

added schemas/VegBIEN/VegBIEN data dictionary.xlsx

bugfix: web/username_prefix.php: user2path(): padding used to visually separate 1st element of URL: require all padding to be __ because sometimes terms contain a leading or trailing _

bugfix: web/username_prefix.php: user2path(): padding used to visually separate 1st element of URL: support embedded @ inside highlighted part: also need to match end-padding when followed by "."

web/username_prefix.php: user2path(): padding used to visually separate 1st element of URL: support embedded @ inside highlighted part

web/username_prefix.php: user2path(): added support for padding used to visually separate 1st element of URL (x@url -> x@url)

bugfix: web/username_prefix.php: need to handle : in login (which would normally indicate a password)

schemas/public_.sql: analytical_stem_view: example terms from each source: added location in the VegBIEN core DB