docs: escape + in table, prevent it from starting an unordered list

rouilj · rouilj · commit 88508ca0b1a7 · 2024-05-30T20:01:08.000-04:00
The markup was being interpreted badly.
diff --git a/doc/admin_guide.txt b/doc/admin_guide.txt
@@ -1095,9 +1095,9 @@ different session database backends:
   +---------------+--------+--------+-------+-------+------------+
   |primary db     | anydbm | sqlite | redis | mysql | postgresql |
   +===============+========+========+=======+=======+============+
-  |anydbm         |    D   |        |   +   |       |            |
+  |anydbm         |    D   |        |   \+  |       |            |
   +---------------+--------+--------+-------+-------+------------+
-  |sqlite         |    +   |    D   |   +   |       |            |
+  |sqlite         |    \+  |    D   |   \+  |       |            |
   +---------------+--------+--------+-------+-------+------------+
   |mysql          |        |        |       |   D   |            |
   +---------------+--------+--------+-------+-------+------------+
