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

prefix=@CMAKE_INSTALL_PREFIX@
exec_prefix=@CMAKE_INSTALL_PREFIX@
libdir=@libdir_for_pc_file@
includedir=@includedir_for_pc_file@

Name: fmt
Description: A modern formatting library
Version: @FMT_VERSION@
Libs: -L${libdir} -l@FMT_LIB_NAME@
Cflags: -I${includedir}