Move files from lib/ into src/ and refactor the random client

src/random_client.h

@@ -0,0 +1,25 @@
+#ifndef BLOB_CLIENT_INCLUDED
+#define BLOB_CLIENT_INCLUDED
+
+#include "tcp.h"
+#include "basic.h"
+
+#include "config.h"
+#include "metadata.h"
+
+typedef struct {
+    ToastyFS *tfs;
+} RandomClient;
+
+struct pollfd;
+
+int random_client_init(void *state, int argc, char **argv,
+    void **ctxs, struct pollfd *pdata, int pcap, int *pnum,
+    int *timeout);
+
+int random_client_tick(void *state, void **ctxs,
+    struct pollfd *pdata, int pcap, int *pnum, int *timeout);
+
+int random_client_free(void *state);
+
+#endif // BLOB_CLIENT_INCLUDED