Maintenance release for the v0.4.x series.

FIXES:

599ad5d3b805 Windows: nvim-qt v0.2.15 (fix "invalid font" error on startup)
1def94597b88 #11332 autocmd: Fix event name casing
b678d33dd321 #11315 test: delete duplicate highlight group
924fa143ccd4 #11225 ex_echo: fix check for got_int
327e8ddb1830 #11138 deps: pass LDFLAGS+=-static
a1f557690f8e #11222 mac: fix "tags file not sorted" bug on Catalina
f2f37712a451 #11187 recovery mode (-r/-L): use headless_mode
4f452a67444a #11190 Remove "highbright bold" conversion.
9571a87d3de0 #11177 third-party: upgrade libvterm to 0.1.2
3817518ab43c #11074 terminfo_start: flush buffer
56d94129995a win_line: update `w_last_cursorline` always
ddd3363a428b #11132 patch_terminfo_bugs: TERM=xterm with non-xterm: ignore smglr
d453d2c48456 Fix redraw regression with w_p_cole in visual mode
e0622b4c65c7 screen: missing redraw/highlight for ruler in message area
b781f2b07273 cmdline: wildmenumode() should be true with wildoptions+=pum
eef3809067ae #11027 win_update: fix redraw regression
43f4955f7048 #11069 Merge pull request from bfredl/virtualcol
6f693be1ee80 #11050 env: use putenv_s for LC_ALL, LANG, etc.
36e2846b493d #11094 paste: fix handling of "<" in cmdline
60b56ed458c6 #11126 Merge pull request from bfredl/invalidcell-0.4
8250d6795b06 screen: don't crash on invalid grid cells being recomposed

Affects getcompletion()

[release-0.4] test: delete duplicate highlight group

Depending on the lua version, 6 might get used instead of
2 here, which causes test failures in upstream builds.
This was fixed as part of #11206 on master

It needs to return to not output any remaining parts.

Followup to https://github.com/neovim/neovim/pull/10926
Ref: https://github.com/neovim/neovim/issues/10923

(cherry picked from commit 93fe30593b47fe98a31c6bb67f4d6effb8b725fe)

This is required when `build_old_libs=no` is used in `libtool`.

Fixes https://github.com/neovim/neovim/issues/11198

(cherry picked from commit 2e14dffbb49666bc79c2aa4fd9cea23d7f2f058c)

I/O in Catalina is currently known to be broken. This commit works
around a pesky bug and also makes the code more consistent by removing
the mix of C file and standard I/O.

Fixes https://github.com/neovim/neovim/issues/11196

(cherry picked from commit d0efc1c9062441c9addc846429794ad4a06cc130)

Fixes https://github.com/neovim/neovim/issues/11181.

(cherry picked from commit 9af0fe529d2d91640e4d3388ab9f28159553f14c)

When using TUI host terminal should take care of this (regardless
if 'termguicolors' is active or not). For GUI the behavior doesn't make
sense (GUI should display bold attr as bold always).

(cherry picked from commit b772b86d2ba256a2c03ab701d00b322cf52560e0)