Changes since version 0.2.6:
- remove Bcc header by default
- added --keep-bcc to keep the Bcc header.
- fixed handling of lines beginning with a dot
- added GNU getopt source for systems that don't have it
- added xvasprintf/xasprintf() to xmalloc.c
- cleaned up xmalloc.c
- changed merror.c to use xvasprintf()
- open_socket() improvements (now uses getaddrinfo() for protocol independence
  and portability)
- Makefile changes (support for more platforms)
- documentation updates

Changes since version 0.2.5:
- added support for IPv6
- documentation update

Changes since version 0.2.4:
- fixed handling of optional arguments for short options
- fixed error handling for gethostbyname()
- minor documentation changes
- renamed smtp.[ch] to esmtp.[ch]
- improved error reporting in smtp_auth_plain()

Changes since version 0.2.3:
- minor error message changes
- minor documentation changes
- cleanups in tls.c
- error handling changes and fixes in tls.c
- fixed potential problems reported by NetBSD's lint(1)
- moved choice of secure authentication method from smtp.c to msmtp.c

Changes since version 0.2.2:
- changed behaviour of --auth: does not accept 'none' anymore,
  no argument means choose a *secure* method.
- changed behaviour of --tls: does not accept 'any', 'none'
  anymore, no argument means choose best method available.
- documentation updates and minor changes
- minor Makefile tweaks
- now use die() to exit in case of memory allocation failure 
- minor tls.c cleanups
- fixed stupid minor bug regarding base64dec()

Changes since version 0.2.1:
- minor change to the Makefile
- minor change to the man page
- minor changes to unify error messages
- close connection on errors in smtp_send()

Changes since version 0.2.0:
- support for AUTH PLAIN
- documentation fixes, updates and cleanups.
- fixed memory leak in smtp_auth_login()
- fixed stupid bug regarding base64enc()
- clean up smtp_auth_cram_md5()

Changes since version 0.1.1:
- AUTH CRAM-MD5 support
- new option (--auth) to choose the authentication method
- support for --version and --help if one of them is the only argument
- documentation fixes / improvements
- better error messages
- Makefile fixes

Changes since version 0.1.0:
- documentation updates / fixes
- better error handling in start_tls()
- adjust MAX_SMTP_LINELEN in smtp.c
