refactor: merged sources of mail-headers,mail-internals,mail-core, mail

Originally it was palaned to do a merge with `--allow-unrelated-history`
but this can not be doesn as `mail-core` has a "invalid" history which
has a merge conflict **with itself**. So even rewinding the history on
a empty repo is not possible.

Instead the code was directly coppied over losing history.

But the history is still available in the different
`history-backup-*` branches. It is just that the past history
is decoupled from the current history.

1 files changed, 78 insertions, 0 deletions

diff --git a/headers/doc/list_of_headers.txt b/headers/doc/list_of_headers.txt
new file mode 100644
index 0000000..7cf1666
--- /dev/null
+++ b/headers/doc/list_of_headers.txt
@@ -0,0 +1,78 @@
+-- FIXME AsciiString => HeaderName
+-- NOT HERE Content-Header-Extension  |AsciiString | Unstructured|,
+-- NOT HERE Other  |AsciiString | Unstructured|,
+
+RFC   | Name                      | Rust-Type         | Comment
+------|---------------------------|-------------------|----------------------------
+5322  |                           |                   |    RFC 5322 obsoletes RFC 822
+      | Date                      | DateTime          |
+      | From                      | MailboxList       |
+      | Sender                    | Mailbox           |
+      | Reply-To                  | MailboxList       |
+      | To                        | MailboxList       |
+      | Cc                        | MailboxList       |
+      | Bcc                       | OptMailboxList    |
+      | Message-ID                | MessageID         |
+      | In-Reply-To               | MessageIDList     |
+      | References                | MessageIDList     |
+      | Subject                   | Unstructured      |
+      | Comments                  | Unstructured      |
+      | Keywords                  | PhraseList        |
+      | Resent-Date               | DateTime          |
+      | Resent-From               | MailboxList       |
+      | Resent-Sender             | Mailbox           |
+      | Resent-To                 | MailboxList       |
+      | Resent-Cc                 | MailboxList       |
+      | Resent-Bcc                | OptMailboxList    |
+      | Resent-Msg-ID             | MessageID         |
+      | Return-Path               | Path              |
+      | Received                  | ReceivedToken     |
+------|---------------------------|-------------------|---------------------------
+2045  | Content-Type              | Mime              |
+      | Content-ID                | MessageID         |
+      | Content-Transfer-Encoding | TransferEncoding  |
+      | Content-Description       | Unstructured      | the rfc states it is TEXT, but referes to RFC822
+      |                           |                   | in RFC5322 there is no longer TEXT, it was replaced
+      |                           |                   | by Unstructured
+------|---------------------------|-------------------|---------------------------
+2183  |                           |                   | proposed standard (obsoltets rfc 1806)
+      | Content-Disposition       | Disposition       |
+------|---------------------------|-------------------|---------------------------
+
+
+
+------ "others" ----
+-- e.g. see https://www.cs.tut.fi/~jkorpela/headers.html
+--Delivered-To   |loop detection|
+--User-Agent   |client software used by orginator|
+--Abuse-Reports-To   |inserted by some servers|
+--X-Envelop-From  |Mailbox|   |sender in the envelop copied into the body|
+--X-Envelop-To  |Mailbox|   |again envelop information moved into body|
+--X-Remote-Addr   |from html|
+--
+------Proposed Standard----
+--RFC 1766
+-- Content-Language  |LanguageTag|
+--RFC 1864
+-- Content-MD5  |Base64|
+--
+------Experimental--------
+--RFC 1806   |attachment of inline|
+-- Content-Disposition  |Dispositions|
+--RFC 1327 & 1911
+-- Importance
+-- Sensitivity
+--RFC 1154 & 1505
+-- Encoding
+--
+------Not Standad ------
+--RFC 1036
+-- FollowupTo  |??MessageID|
+--RFC 1036   |count of lines|
+-- Lines  |usize|
+--RFC ????
+-- Status  |U/R/O/D/N|   |should NEVER EVER be generate for a mail to send, use by some mail delivery systems INTERNAL ONLY|
+--
+--
+------Not Standard Discouraged----
+--ContentLength  |usize|   |do never generate content length header in a mail you send, it's a HTTP think|
\ No newline at end of file