SVG : Add icons for Moxxy and POSIX;

TOML   : Enable more entries;
Python : Add logic for POSIX;
XHTML  : Add a notice about POSIX.

fasi.py

@@ -637,7 +637,10 @@ class HttpInstance:
                         software = 'apple'
 
             name = software.title()
-            if 'os' in software: name = name.replace('os', 'OS')
+            if software == 'posix':
+                name = 'POSIX'
+            elif 'os' in software:
+                name = name.replace('os', 'OS')
 
             filename_clients = 'clients.toml'
             clients = Data.open_file_toml(filename_clients)