util/NumberParser: rename to CNumberParser

A new NumberParser library based on std::from_chars() will be added.

src/db/plugins/simple/DirectorySave.cxx

@@ -13,7 +13,7 @@
 #include "lib/fmt/RuntimeError.hxx"
 #include "util/StringAPI.hxx"
 #include "util/StringCompare.hxx"
-#include "util/NumberParser.hxx"
+#include "util/CNumberParser.hxx"
 
 #include <fmt/format.h>
 

src/db/plugins/upnp/ContentDirectoryService.cxx

@@ -4,7 +4,7 @@
 #include "lib/upnp/ContentDirectoryService.hxx"
 #include "lib/upnp/Action.hxx"
 #include "Directory.hxx"
-#include "util/NumberParser.hxx"
+#include "util/CNumberParser.hxx"
 
 #include <fmt/format.h>
 

src/db/plugins/upnp/Directory.cxx

@@ -6,7 +6,7 @@
 #include "Tags.hxx"
 #include "tag/Builder.hxx"
 #include "tag/Table.hxx"
-#include "util/NumberParser.hxx"
+#include "util/CNumberParser.hxx"
 
 #include <algorithm>
 #include <string>