Rename getline function to unsafe, to make it greppable.

Now i can trim them one-by-one.

dpid/dpi.cc

@@ -64,7 +64,7 @@ char *a_Dpi_rd_dpi_socket_dir(char *dirname)
    dFree(rcpath);
 
    if ((dir = fopen(dirname, "r")) != NULL) {
-      sockdir = dGetline(dir);
+      sockdir = dGetline_unsafe(dir);
       fclose(dir);
    } else if (errno == ENOENT) {
       ERRMSG("a_Dpi_rd_dpi_socket_dir", "fopen", errno);