Makefile: make it possible to build text frontend

use 'make ixchat-text' to build it
remove all remaining WIN32 code
remove hpux specific code
remove OS/2 specific code
remove superfluous autoreconnectonfail and fix SSL reconnect ...

i dont see a point in a separate  prefs.autoreconnectonfail
if we already have prefs.autoreconnect.
even worse, the setting was not reachable via gui and could
only be set via /SET.

as for the handler code for this error:
"error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number"
"Are you sure this is a SSL capable server and port?"

the gtk frontend seems to ignore the return value of the function
that handles it (ssl_do_connect()), but in the text frontend
the timeout handler job was removed if the function returned 0.

now, if autoreconnect is set, it will reconnect on this error in
both frontends.
fix autoreconnect on 'Proxy traversal failed'
Makefile: make perl header gen depend on the input files