Allow larger images/videos to be uploaded if they are going to be converted

- 변환 대상인 이미지나 동영상 파일은 용량 제한을 더 느슨하게 설정할 수 있도록 함
- 변환 후에 다시 용량을 체크하여 각 게시판의 업로드 정책 적용
- https://rhymix.org/qna/1926104

modules/file/lang/en.php

@@ -21,6 +21,7 @@ $lang->allowed_filesize = 'Maximum File Size';
 $lang->allowed_filesize_exceeded = 'The file is too large. The maximum allowed filesize is %s.';
 $lang->allowed_attach_size = 'Maximum Attachments';
 $lang->allowed_filetypes = 'Allowed extentsions';
+$lang->pre_conversion_filesize = 'Pre-conversion Grace Size';
 $lang->download_short_url = 'Use short URL';
 $lang->inline_download_format = 'Open in current window';
 $lang->inline_download_image = 'Image';
@@ -45,6 +46,7 @@ $lang->about_allowed_filesize_global = 'This is the global limit on the size of
 $lang->about_allowed_attach_size_global = 'This is the global limit on the combined size of all attachments in one document.';
 $lang->about_allowed_size_limits = 'The file size will be limited to the value set in php.ini (%sB) in IE9 and below and older Android browsers.';
 $lang->about_allowed_filetypes = 'Rhymix no longer uses the old *.* syntax. Simply list the extensions you wish to allow.<br />Please use a comma (,) to separate items: e.g. doc, zip, pdf';
+$lang->about_pre_conversion_filesize = 'If an image or video might be converted as configured below, it will be allowed up to this size, and checked again after conversion.<br>If this configuration is empty, the file must be below the allowed size both before and after conversion.';
 $lang->about_save_changelog = 'Keep a log of new and deleted files in the database.';
 $lang->cmd_delete_checked_file = 'Delete Selected Item(s)';
 $lang->cmd_move_to_document = 'Move to Document';