evrpc_hook_add_meta() allows hooks to add meta data to a request. for
a client request, the meta data can be inserted by an outgoing request hook
and retrieved by the incoming request hook.
@param ctx the context provided to the hook call
@param key a NUL-terminated c-string
@param data the data to be associated with the key
@param data_size the size of the data
adds meta data to request
evrpc_hook_add_meta() allows hooks to add meta data to a request. for a client request, the meta data can be inserted by an outgoing request hook and retrieved by the incoming request hook.
@param ctx the context provided to the hook call @param key a NUL-terminated c-string @param data the data to be associated with the key @param data_size the size of the data