[everything] unexpand and delete whitespace at EOL; ok markus@ (done locally and RCS IDs synced)
- [packet.h packet.c] ssh2 packet format - [packet.h packet.c nchan2.ms nchan.h compat.h compat.c] [channels.h channels.c] channel layer support for ssh2 - [kex.h kex.c hmac.h hmac.c dsa.c dsa.h] DSA, keyexchange, algorithm agreement for ssh2