patch 9.0.0278: the +wildignore feature is nearly always available

Problem:    The +wildignore feature is nearly always available.
Solution:   Graduate +wildignore for consistency.
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index e4bf25f..bdcb00f 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1177,8 +1177,6 @@
 				 Unix: "/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*"
 				 Mac: "/private/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*")
 			global
-			{not available when compiled without the |+wildignore|
-			feature}
 	A list of file patterns.  When one of the patterns matches with the
 	name of the file which is written, no backup file is created.  Both
 	the specified file name and the full path name of the file are used.
@@ -9024,8 +9022,6 @@
 						*'wildignore'* *'wig'*
 'wildignore' 'wig'	string	(default "")
 			global
-			{not available when compiled without the |+wildignore|
-			feature}
 	A list of file patterns.  A file that matches with one of these
 	patterns is ignored when expanding |wildcards|, completing file or
 	directory names, and influences the result of |expand()|, |glob()| and
@@ -9156,8 +9152,6 @@
 						*'wildoptions'* *'wop'*
 'wildoptions' 'wop'	string	(default "")
 			global
-			{not available when compiled without the |+wildignore|
-			feature}
 	A list of words that change how |cmdline-completion| is done.
 	The following values are supported:
 	  fuzzy		Use |fuzzy-matching| to find completion matches. When
diff --git a/runtime/doc/various.txt b/runtime/doc/various.txt
index 92403d3..528901d 100644
--- a/runtime/doc/various.txt
+++ b/runtime/doc/various.txt
@@ -490,7 +490,7 @@
 T  *+visualextra*	extra Visual mode commands |blockwise-operators|
 T  *+vreplace*		|gR| and |gr|
    *+vtp*		on MS-Windows console: support for 'termguicolors'
-N  *+wildignore*	|'wildignore'|
+T  *+wildignore*	|'wildignore'|  Always enabled since 9.0.0278
 N  *+wildmenu*		|'wildmenu'|
 T  *+windows*		more than one window; Always enabled since 8.0.1118.
 m  *+writebackup*	|'writebackup'| is default on