Problem:    New buffers are not added to the Buffers menu.
Solution:   Turn number into string. (Yee Cheng Chin, closes vim/vim#5864)
https://github.com/vim/vim/commit/5908fdf72fa1995735e38c46f254ddde81a87c1f

Problem:    Buffer menu does not handle special buffers properly.
Solution:   Keep a dictionary with buffer names to reliably keep track of
            entries.
            Also trigger BufFilePre and BufFilePost for command-line and
            terminal buffers when the name changes.
https://github.com/vim/vim/commit/5e94a29ebbde10dd973d58f1adba9a2fc83877d1

Problem:    No menus specifically for the terminal window.
Solution:   Add :tlmenu. (Yee Cheng Chin, closes vim/vim#3439) Add a menu test.
https://github.com/vim/vim/commit/4c5d815256099b50eca2ec5bf8f9aaa67a890211

ADDR_OHTER comes from patch 8.1.1241, which has already been ported.

Update runtime files
https://github.com/vim/vim/commit/1588bc8ebee22f2855f27273fc2234fff370f86c

omit: doc updates

Update runtime files
https://github.com/vim/vim/commit/65e0d77a66b7e50beb562ad554ace46c32ef8f0f

Omit usr_46.txt because of vim9.

Update runtime files
https://github.com/vim/vim/commit/5ef1c6a4838a9629b793f3ae676f72a764171b00

"scrollfocus" is for Windows GUI only so it is N/A.

Update runtime files.
https://github.com/vim/vim/commit/5be4ceecea5520265066eac972460ebb1cdf05e7

Problem:    Loading menus sets v:errmsg.
Solution:   Avoid setting v:errmsg and add a test for that. (Jason Franklin)
https://github.com/vim/vim/commit/e24c5b3332b453175e5f73423884087a4aef1247

Update runtime files
https://github.com/vim/vim/commit/30e9b3c4256710781c3bd64efb33f138e4e074b3

Update runtime files.
https://github.com/vim/vim/commit/314dd79cac2adc10304212d1980d23ecf6782cfc