bug #37441: lockbits in ATxmega + avrdude = problem
* fileio.c: replace strmcp(..., "lock") by strncmp(..., "lock", 4)
where applicable



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1338 81a1dc3b-b13d-400b-aceb-764788c761c2
ser_posix: added support for faster baudrates than 230400 on posix based systems
butterfly: implemented a variabel timeout for the erase call in the avr109 protocol. Needed to support AVRs with more than 128kB programm memory.