[libsoup] (11 commits) ...docs: Fix extraneous *

[Patrick Griffis <pgriffis src gnome org>]

Summary of changes:

  3e45cf7... docs: Document SoupCacheability (*)
  53e1c32... Make soup_auth_domain_try_generic_auth_callback private (*)
  33eec6f... docs: Document return of soup_auth_negotiate_supported() (*)
  64dffe0... docs: Document SoupCache properties (*)
  1b51db8... build: Change docs to a feature set to auto (*)
  a658126... build: Add option to validate docs (*)
  d6ef347... docs: Document error quark functions (*)
  2cbe4dd... docs: Document deprecation macros (*)
  0ba4a7e... CI: Strictly validate docs (*)
  12de631... build: Handle docs being built without introspection (*)
  0bb2b7e... docs: Fix extraneous * (*)

(*) This commit already existed in another branch; no separate mail sent