/usr/share/gtk-doc/html/libsoup-2.4/ is in libsoup2.4-doc 2.44.2-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/libsoup-2.4/SoupAddress.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupAuth.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupAuthDomain.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupAuthDomainBasic.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupAuthDomainDigest.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupAuthManager.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupCache.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupContentDecoder.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupContentSniffer.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupCookie.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupCookieJar.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupCookieJarDB.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupCookieJarText.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupLogger.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupMessage.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupMessageBody.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupMessageHeaders.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupMultipart.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupMultipartInputStream.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupProxyResolverDefault.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupRequest.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupRequestData.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupRequestFile.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupRequestHTTP.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupServer.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupSession.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupSessionAsync.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupSessionFeature.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupSessionSync.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupSocket.html
/usr/share/gtk-doc/html/libsoup-2.4/SoupURI.html
/usr/share/gtk-doc/html/libsoup-2.4/annotation-glossary.html
/usr/share/gtk-doc/html/libsoup-2.4/ch01.html
/usr/share/gtk-doc/html/libsoup-2.4/ch02.html
/usr/share/gtk-doc/html/libsoup-2.4/ch03.html
/usr/share/gtk-doc/html/libsoup-2.4/ch04.html
/usr/share/gtk-doc/html/libsoup-2.4/ch05.html
/usr/share/gtk-doc/html/libsoup-2.4/home.png
/usr/share/gtk-doc/html/libsoup-2.4/index.html
/usr/share/gtk-doc/html/libsoup-2.4/index.sgml
/usr/share/gtk-doc/html/libsoup-2.4/ix01.html
/usr/share/gtk-doc/html/libsoup-2.4/left.png
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-GValue-Support.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-HTML-Form-Support.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-Soup-Miscellaneous-Utilities.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-Top-Level-Domain-utils.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-Version-Information.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-XMLRPC-Support.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-soup-method.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4-soup-status.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-2.4.devhelp2
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-build-howto.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-client-howto.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-server-howto.html
/usr/share/gtk-doc/html/libsoup-2.4/libsoup-session-porting.html
/usr/share/gtk-doc/html/libsoup-2.4/right.png
/usr/share/gtk-doc/html/libsoup-2.4/style.css
/usr/share/gtk-doc/html/libsoup-2.4/up.png