patch 9.1.0779: filetype: neomuttlog files are not recognized

Problem:  filetype: neomuttlog files are not recognized
Solution: detect '*.neomuttdebug' file as neomuttlog filetype,
          include neomuttlog syntax script (Richard Russon)

closes: #15858

Co-authored-by: AvidSeeker <avidseeker7@protonmail.com>
Signed-off-by: Richard Russon <rich@flatcap.org>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 29bb7b5..1c66042 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -2538,6 +2538,12 @@
 	:let msql_minlines = 200
 
 
+NEOMUTT			*neomutt.vim* *ft-neomuttrc-syntax* *ft-neomuttlog-syntax*
+
+To disable the default NeoMutt log colors >
+
+	:let g:neolog_disable_default_colors = 1
+
 N1QL						*n1ql.vim* *ft-n1ql-syntax*
 
 N1QL is a SQL-like declarative language for manipulating JSON documents in
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 8dee55d..c3089bb 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -7365,6 +7365,8 @@
 ft-n1ql-syntax	syntax.txt	/*ft-n1ql-syntax*
 ft-nasm-syntax	syntax.txt	/*ft-nasm-syntax*
 ft-ncf-syntax	syntax.txt	/*ft-ncf-syntax*
+ft-neomuttlog-syntax	syntax.txt	/*ft-neomuttlog-syntax*
+ft-neomuttrc-syntax	syntax.txt	/*ft-neomuttrc-syntax*
 ft-nroff-syntax	syntax.txt	/*ft-nroff-syntax*
 ft-ocaml-syntax	syntax.txt	/*ft-ocaml-syntax*
 ft-pandoc-syntax	syntax.txt	/*ft-pandoc-syntax*
@@ -8875,6 +8877,7 @@
 nb-special	netbeans.txt	/*nb-special*
 nb-terms	netbeans.txt	/*nb-terms*
 ncf.vim	syntax.txt	/*ncf.vim*
+neomutt.vim	syntax.txt	/*neomutt.vim*
 netbeans	netbeans.txt	/*netbeans*
 netbeans-commands	netbeans.txt	/*netbeans-commands*
 netbeans-configure	netbeans.txt	/*netbeans-configure*