lib: rename support-ngrams => ngrams-enabled

For consistency.

lib/message/mu-document.cc

@@ -79,7 +79,7 @@ make_term_generator(Xapian::Document& doc, Document::Options opts)
 {
 	Xapian::TermGenerator termgen;
 
-	if (any_of(opts & Document::Options::SupportNgrams))
+	if (any_of(opts & Document::Options::NgramsEnabled))
 		termgen.set_flags(Xapian::TermGenerator::FLAG_NGRAMS);
 
 	termgen.set_document(doc);

lib/message/mu-document.hh

@@ -43,7 +43,7 @@ class Document {
 public:
 	enum struct Options {
 		None	      = 0,
-		SupportNgrams = 1 << 0,     /**< Support ngrams, as used in
+		NgramsEnabled = 1 << 0,     /**< Support ngrams, as used in
 					     * CJK and other languages. */
 	};
 

lib/message/mu-message.cc

@@ -78,8 +78,8 @@ struct Message::Private {
 
 private:
 	Document::Options doc_opts(Message::Options mopts) {
-		return any_of(opts & Message::Options::SupportNgrams) ?
-			Document::Options::SupportNgrams :
+		return any_of(opts & Message::Options::NgramsEnabled) ?
+			Document::Options::NgramsEnabled :
 			Document::Options::None;
 	}
 };

lib/message/mu-message.hh

@@ -52,7 +52,7 @@ public:
 						   * access) */
 		AllowRelativePath = 1 << 2,	/**< Allow relative paths for filename
 						   * in make_from_path */
-		SupportNgrams     = 1 << 3,     /**< Support ngrams, as used in
+		NgramsEnabled     = 1 << 3,     /**< Support ngrams, as used in
 						 * CJK and other languages. */
 	};