patch 8.2.3598: RouterOS filetype is not recognized

Problem:    RouterOS filetype is not recognized.
Solution:   Add file and script patterns. (closes #9097)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index ef2ac84..de2b0f2 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -420,6 +420,7 @@
     \ 'rnc': ['file.rnc'],
     \ 'rng': ['file.rng'],
     \ 'robots': ['robots.txt'],
+    \ 'routeros': ['file.rsc'],
     \ 'rpcgen': ['file.x'],
     \ 'rpl': ['file.rpl'],
     \ 'rst': ['file.rst'],
@@ -660,6 +661,7 @@
       \ 'yaml': [['%YAML 1.2']],
       \ 'pascal': [['#!/path/instantfpc']],
       \ 'fennel': [['#!/path/fennel']],
+      \ 'routeros': [['#!/path/rsc']],
       \ }
 
 " Various forms of "env" optional arguments.
diff --git a/src/version.c b/src/version.c
index 9cf0ee6..7cffc01 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3598,
+/**/
     3597,
 /**/
     3596,