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- fix spelling of variable name

- Make parsing of "Accept-Language" header fields more robust:

ignore spaces after the comma, ignore wildcard value "*"

- Accept locales as syntactically correct when these contain numeric values (such as e.g. "es_419" for “Latin American Spanish”).

Since lang::conn::valid_locale_p is used in lang::conn::get_accept_language_header, OpenACS throws exceptions

on invalid locales, these caused problem even when these are low on the preference list of the Accept-Language header field.

- allow empty locale cookie

- return the invalid cookie in the error

- add validator for locale (useful, when headers or locale-cookie were hacked)

- provide an error message for invalid locale values

- add editor hints to keep spaces/tabs in the furture more consistent

  1. … 754 more files in changeset.