patch 8.2.3805: i3config files are not recognized

Problem:    i3config files are not recognized.
Solution:   Add patterns to match i3config files. (Quentin Hibon,
            closes #7969)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 619cfec..38941ba 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -226,6 +226,7 @@
     \ 'hollywood': ['file.hws'],
     \ 'hostconf': ['/etc/host.conf', 'any/etc/host.conf'],
     \ 'hostsaccess': ['/etc/hosts.allow', '/etc/hosts.deny', 'any/etc/hosts.allow', 'any/etc/hosts.deny'],
+    \ 'i3config': ['/home/user/.i3/config', '/home/user/.config/i3/config', '/etc/i3/config', '/etc/xdg/i3/config'],
     \ 'logcheck': ['/etc/logcheck/file.d-some/file', '/etc/logcheck/file.d/file', 'any/etc/logcheck/file.d-some/file', 'any/etc/logcheck/file.d/file'],
     \ 'modula3': ['file.m3', 'file.mg', 'file.i3', 'file.ig'],
     \ 'natural': ['file.NSA', 'file.NSC', 'file.NSG', 'file.NSL', 'file.NSM', 'file.NSN', 'file.NSP', 'file.NSS'],
diff --git a/src/version.c b/src/version.c
index df439e0..30a71e1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3805,
+/**/
     3804,
 /**/
     3803,