make “source” into a built-in command (keepasn, to match ksh93 and “dot”);

remove the “stop” alias and drop old Android and OS/2 hacks and auto-unalias

lksh.1

@@ -1,4 +1,4 @@
-.\" $MirOS: src/bin/mksh/lksh.1,v 1.14 2015/10/09 20:33:49 tg Exp $
+.\" $MirOS: src/bin/mksh/lksh.1,v 1.15 2015/10/09 21:36:56 tg Exp $
 .\"-
 .\" Copyright (c) 2008, 2009, 2010, 2012, 2013, 2015
 .\"	mirabilos <m@mirbsd.org>
@@ -289,18 +289,6 @@ mode and
 .Nm lksh
 do not keep file descriptors \*(Gt 2 private from sub-processes.
 .It
-.\"XXX TODO: move to FSH? fix upstreams? both ugh.
-.Nm lksh
-undefines an alias when a
-.Tn POSIX
-function with the same name is defined,
-to make that function immediately callable.
-In
-.Nm mksh ,
-aliases have precedence; the name must be quoted or
-.Ic unalias Ns ed
-to access it.
-.It
 Functions defined with the
 .Ic function
 reserved word share the shell options