Recognize backslash in `dns-mode` quoted values

* lisp/textmodes/dns-mode.el (dns-mode-syntax-table): Recognize
backslash as an escape character.  (Bug#66660)

(cherry picked from commit e6f05e189db73a0f0b29f987381ffef61a409232)

diff --git a/lisp/textmodes/dns-mode.el b/lisp/textmodes/dns-mode.el
index 1b5f0c1d94bc528ebb98cfc21c5b41db3cf378ea..bc3fa8d8e3aab6e1ec42f8d5cc97fc62f15ef728 100644 (file)
--- a/lisp/textmodes/dns-mode.el
+++ b/lisp/textmodes/dns-mode.el
@@ -132,6 +132,7 @@ manually with \\[dns-mode-soa-increment-serial]."
     (modify-syntax-entry ?\; "<   " table)
     (modify-syntax-entry ?\n ">   " table)
     (modify-syntax-entry ?\" "\""   table)
+    (modify-syntax-entry ?\\ "\\"   table)
     table)
   "Syntax table in use in DNS master file buffers.")