document the find_all_servers function

include/libnfs.h

@@ -955,10 +955,24 @@ off_t nfs_get_current_offset(struct nfsfh *nfsfh);
 
 
 
+
+
 struct nfs_server_list {
        struct nfs_server_list *next;
        char *addr;
 };
 
+/*
+ * Sync find_local_servers(<server>)
+ * This function will probe all local networks for NFS server. This function will
+ * block for one second while awaiting for all nfs servers to respond.
+ *
+ * Function returns
+ * NULL : something failed
+ *
+ * struct nfs_server_list : a linked list of all discovered servers
+ * 
+ * returned data must be freed by nfs_free_srvr_list(srv);
+ */
 struct nfs_server_list *nfs_find_local_servers(void);
 void free_nfs_srvr_list(struct nfs_server_list *srv);