Handle long configuration file lines more gracefully

Handle long configuration file lines more gracefully

Skip the end of long configuration lines that get truncated in
wpa_config_get_line(). Without this, the rest of the file was being
parsed as another line and that resulted in an unexpected error
message (wrong line number and wrong starting point).

In addition, increase the read buffer for network blocks from 256
to 2000 since p2p_client_list parameter can have long values. These
were supposed to truncated cleanly, but the unexpected processing of
the end of the file (which is now fixed in this commit) could cause
configuration file to be rejected.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
intended-for: hostap-1