* modules/access/*: pf_read() in access modules is now blocking. We still

* modules/access/*: pf_read() in access modules is now blocking. We still
   check regularly for p_input->b_die though. Now the demuxers can safely
   assume that pf_read() == 0 means EOF.
* ALL: got rid of the p_input->b_connected flag.
* src/input/input_ext-plugins.c, src/input/input.c: fixed the infinite loop
   of "decoder stuck" messages that sometimes happened.
* src/interface/intf_eject.c, modules/misc/network/ipv4.c: fixed compilation
   warnings.