patch 9.1.0555: filetype: angular ft detection is still problematic

Problem:  filetype: angular ft detection is still problematic
          (after 9.1.0551)
Solution: detect htmlangular filetype only by inspecting the content,
          do not try to determine it from a generic name like
          '*.component.html'

For the reasons mentioned here:

https://github.com/vim/vim/pull/13594#issuecomment-1834465890

related: #15190
related: #13594
related: #13604

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index de87886..3b0b2e9 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -335,8 +335,8 @@
     hoon: ['file.hoon'],
     hostconf: ['/etc/host.conf', 'any/etc/host.conf'],
     hostsaccess: ['/etc/hosts.allow', '/etc/hosts.deny', 'any/etc/hosts.allow', 'any/etc/hosts.deny'],
-    html: ['file.html', 'file.htm', 'file.cshtml'],
-    htmlangular: ['file.component.html'],
+    # file.component.html should be HTML, not Angular, see #13594
+    html: ['file.html', 'file.htm', 'file.cshtml', 'file.component.html'],
     htmlm4: ['file.html.m4'],
     httest: ['file.htt', 'file.htb'],
     hurl: ['file.hurl'],
diff --git a/src/version.c b/src/version.c
index 0de9c55..96691df 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    555,
+/**/
     554,
 /**/
     553,