for #2429, also set max_buffer_size for HTTPServer
for #2429, also set max_buffer_size for HTTPServer

radiasoft/sirepo,mkeilman/sirepo,mkeilman/sirepo,mkeilman/sirepo,radiasoft/sirepo,radiasoft/sirepo,radiasoft/sirepo,mkeilman/sirepo,radiasoft/sirepo