patch 8.0.1639: libvterm code lags behind master
Problem: Libvterm code lags behind master.
Solution: Sync to head, solve merge problems.
diff --git a/src/libvterm/doc/seqs.txt b/src/libvterm/doc/seqs.txt
index e5372d0..c26dc44 100644
--- a/src/libvterm/doc/seqs.txt
+++ b/src/libvterm/doc/seqs.txt
@@ -151,6 +151,7 @@
DECSM 1000 = Mouse click/release tracking
DECSM 1002 = Mouse click/release/drag tracking
DECSM 1003 = Mouse all movements tracking
+ DECSM 1004 = Focus in/out reporting
DECSM 1005 = Mouse protocol extended (UTF-8) - not recommended
DECSM 1006 = Mouse protocol SGR
DECSM 1015 = Mouse protocol rxvt