Update SMALL.md

Some of the advice was decades outdated

SMALL.md

@@ -1,6 +1,6 @@
 ## Tips for a small system
 
-If you only want server functionality (for example), compile with
+If you only want server functionality, compile with
 
 ```
 make PROGRAMS=dropbear
@@ -12,23 +12,20 @@ rather than just
 make dropbear
 ```
 
-so that client functionality in shared portions of Dropbear won't be included. The same applies if you are compiling just a client.
+so that client functionality in shared portions of Dropbear won't be included. The same applies for `PROGRAMS=dbclient`.
 
 ---
-The following are set in *localoptions.h*:
+The following are set in *localoptions.h*. See *default_options.h* for possibilities.
 
-* If you're compiling statically, you can turn off host lookups.
+* You can disable either password or public-key authentication.
 
-* You can disable either password or public-key authentication, though note that the IETF draft states that pubkey authentication is required.
+* Various algorithms can be disabled if they are not required by any connecting SSH clients/servers. Disabling many is fine for a local install, though
+builds for public consumption require more consideration.
 
-* Similarly with DSS and RSA, you can disable one of these if you know that all clients will be able to support a particular one. The IETF draft states that DSS is required, however you may prefer to use RSA. **DON'T** disable either of these on systems where you aren't 100% sure about who will be connecting and what clients they will be using.
-
-* Disabling the `MOTD` code and `SFTP-SERVER` may save a small amount of codesize.
-
-* You can disable x11, tcp and agent forwarding as desired. None of these are essential, although agent-forwarding is often useful even on firewall boxes.
+* You can disable x11, tcp and agent forwarding as desired. None of these are essential (depending on use cases)
 
 ---
-If you are compiling statically, you may want to disable zlib, as it will use a few tens of kB of binary-size
+If you are compiling statically, you may want to disable zlib, as it will use a few tens of kB of binary size
 ```
 ./configure --disable-zlib
 ```
@@ -45,7 +42,7 @@ CFLAGS="-ffunction-sections -fdata-sections"
 You can also experiment with optimisation flags such as `-Os`. Note that in some cases these flags actually seem to increase size, so experiment before
 deciding.
 
-Of course using small C libraries such as uClibc and dietlibc can also help.
+Of course using small C libraries such as musl can also help.
 
 ---
 Libtommath has its own default `CFLAGS` to improve speed. You can use