Added HTML wrapper for mails

The mailwrap.html adds the standard headers and footers to all HTML
mails. The signature present in the text body will be removed before
inserting in the wrapper, allowi

Added HTML wrapper for mails

The mailwrap.html adds the standard headers and footers to all HTML
mails. The signature present in the text body will be removed before
inserting in the wrapper, allowing a nicer footer for HTML.

Users can overwrite the file with their own to create HTML mails in
corporate design. However, a way to automatically embed referenced
images is missing currently.

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allow non-txt extensions when accessing locales

fixed german language strings

fixed various errors in language files

Bulgarian language update

Czech language update

Finnish language fixes

fixed HTML in Esperanto language file

added Mailer class to autoloader

Replaced mail_send calls with new Mailer class

Make use of new Mailer class in notify()

It now uses inline diff format for diff HTML mails

Copy all text replacements to HTML replacements in Mailer

With this change it's easy to just set the replacements for HTML that
need special attention.

Use mailprefix also for registration and resend password notification mails (FS#2366)

de/de-informal: language updates

Added setBody() to Mailer class

This method makes it easy to send a HTML mail based on the default text
mails. This is probably enough for simpler mails where no sophisticated
HTML is needed except

Added setBody() to Mailer class

This method makes it easy to send a HTML mail based on the default text
mails. This is probably enough for simpler mails where no sophisticated
HTML is needed except a bit of formatting and linked URLs.

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shorten title when used as prefix

mail prefix defaults to title when empty

added old plugin hook back into Mailer class

it now passes the whole Mail object and also signals if the mail sending
was successful to the AFTER event. A bunch of references should make it
compatib

added old plugin hook back into Mailer class

it now passes the whole Mail object and also signals if the mail sending
was successful to the AFTER event. A bunch of references should make it
compatible with old plugins.

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clean headers in a separate step

this should make it easier to reintroduce a plugin hook compatible with
the old one

Esperanto language update

Slovak language update

Release preparations

use DOKU_SCRIPT instead of stray doku.php in checkUpdateMessages() (FS#2364)

German translation for password reset

translatable AD expiry warning and link to update profile page