patch 9.1.0875: filetype: hyprlang detection can be improved

Problem:  filetype: hyprlang detection can be improved
Solution: detect '/hypr/*.conf' files as hyprlang filetype,
          include basic syntax highlighting (Luca Saccarola)

fixes: #15875
closes: #16064

Signed-off-by: Luca Saccarola <github.e41mv@aleeas.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_filetype.vim

@@ -354,7 +354,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     htmlm4: ['file.html.m4'],
     httest: ['file.htt', 'file.htb'],
     hurl: ['file.hurl'],
-    hyprlang: ['hyprlock.conf', 'hyprland.conf', 'hypridle.conf', 'hyprpaper.conf'],
+    hyprlang: ['hyprlock.conf', 'hyprland.conf', 'hypridle.conf', 'hyprpaper.conf', '/hypr/foo.conf'],
     i3config: ['/home/user/.i3/config', '/home/user/.config/i3/config', '/etc/i3/config', '/etc/xdg/i3/config'],
     ibasic: ['file.iba', 'file.ibi'],
     icemenu: ['/.icewm/menu', 'any/.icewm/menu'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    875,
 /**/
     874,
 /**/