* 2021.2.24 gcc version 7.5.0 Warning clean up, Supports character length, parity, stop bits, transmit breaks.
* 2017.4.4 read,write warn_unused_result problem clean up ; open with O_CREAT in second argument needs 3 arguments problem clean up ; curses.h and term.h remove.
* 2011.10.16 Enhanced file locking, changed the function msleep.
* 2011.9.27 On quiet mode, delete 'Disconnected message'.
* 2010.11.19  warning: ignoring return value of write found etc, declared with attribute warn_unused_result. clean up.
* 2009.11.1 add -q option quiet mode, clean up. 
* 2009.6.26 man & Makefile.am update.
* 2009.6.23 telnet client bug fix.(corresponds to TELOPT_ENCRYPT & window size) 
o telnet to Linux & FreeBSD server supported.
* 2009.6.9 corresponds to automake. 
o Operation is confirmed with freebsd7.2. -> Thanks! patch from OpenBSD'fun  

* epicon.h epicon incude heder file
o 2009.6.7 Epicon_Socket_init  "/var/tmp/epicon_socket." -> "/tmp/epicon_socket."
o 2008.3.23 add #include <stdlib.h>, bug fix gcc-4 -> incompatible implicit declaration of
 built-in function exit
o 2007.1.4 add #include telnet.h, remove ncurses.h
o 2006.8.17 add #define Epicon_Socket
o 2002.11.6 oops typo.  SPEED -> "SPEED"

* epicon.c epicon command interface program
o 2009.11.1 rename main.c -> epicon.c, add -q option quiet mode.
o 2008.5.10 bugs fix alarm(5) -> alarm(10),initialize_com_port(); -> if (ck_pid) initializ
e_com_port();
o 2008.1.4 easy telnet client is supported, -v option is changed to the line mode.
o 2007.9.29 bugs fix "/var/lock/epicon_socket"+.pid->Epicon_Socket,Auto rz
o 2006.8.17 bugs fix "/var/lock/epicon_socket"->Epicon_Socket
o 2005.9.10 bug fix (usage)
o 2004.10.23 default client port 9999->23
o 2004.10.1 add "-v" vt100 console mode
o 2004.10.1 add "-F" send character file with delay
o 2004.9.20 add "-d" send charcacter delay,add "-D" send CR delay.
o 2003.10.1 clean up
o 2002.12.24 clean up.
o 2002.11.6 add "-L" log option.
o 2002.11.2 add "-c" execute external command option.
o 2002.11.1 add "-f" send file option.

* epicon_main.c epicon main program
o 2009.11.1 add -q option quiet mode.
o 2009.6.23 telnet client bug fix.(corresponds to TELOPT_ENCRYPT,window size)
o 2008.1.9 bugs fix auto rz.
o 2008.1.4 easy telnet client is supported, -v option is changed to the line mode.
o 2007.9.30 bugs fix "/var/lock/epicon_socket"+.pid->Epicon_Socket,Auto rz
o 2006.8.17 bugs fix "/var/tmp/epicon_socket"->Epicon_Socket
o 2005.12.17 bugs fix (case of newline,ESC,ESC)
o 2005.9.10 many bugs fix (ESC,ip server)
o 2004.10.1 add "-F" send character file with delay
o 2004.9.20 add "-d" send charcacter delay,add "-D" send CR delay.
o 2003.10.2 clean up.
o 2003.9.13 oops select() using.
o 2002.11.6 add "-c" external command option.
o 2002.11.1 add "-f" send file option.
o 2002.10.27 gcc-2.96 available

* epicon_uty.c epicon utitlity program
o 2009.11.1 add -q option quiet mode.
o 2009.6.8 delete CBAUD IUCLC OLCUC
  add cfsetispeed(&com_port_set, speed) ,cfsetospeed(&com_port_set, speed)
  com_port_set.c_cflag |= CLOCAL|(speed) -> com_port_set.c_cflag |= CLOCAL
o 2008.1.4 easy telnet client is supported, -v option is changed to the line mode.
o 2007.9.29 bugs fix "/var/lock/epicon_socket"+.pid->Epicon_Socket,Auto rz
o 2006.8.17 bugs fix "/var/lock/epicon_socket"->Epicon_Socket
o 2005.12.23 clean up, com_port_use_check(com)--> /var/lock -> /var/tmp
o 2005.9.10 clean up.
o 2004.10.1 add "-v" vt100 imitate console mode
o 2004.10.1 add "-F" send character file with delay
o 2004.9.20 add msleep() for "-d" send charcacter delay,add "-D" send CR delay.
o 2003.10.3 gkermit packet 4000 -> 9000. & clean up
o 2002.12.24 clean up.
o 2002.11.6 clean up.
o 2002.11.2 add send_file process.
o 2002.10.30 oops sz process typo *c->c[64].
o 2002.10.25 add when execute external programs was none.

