http: optimize HTTP request thread we don't need a mutex at all, in fact all we need is an atomic boolean to signify whether the thread is cancelled. curl options are now for the most part handled by a separate function to keep them in sync between non-threaded and threaded implementations

@PACKAGE_INIT@

if (NOT TARGET fmt::fmt)
  include(${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake)
endif ()

check_required_components(fmt)