Convert to use OptionParser for command line handling.

Move the command line option handling from the more manual "getopts"
module to the full fledged "OptionParser". It has the advantage of
e.g. automatically creating the Help text that is shown with the
"-h/--help" option rather than having to hardcode the text and
format the line breaking manually.

Also, do away with the version check when invoking OfflineImap so we
do not have to change the version number in three places when bumping
it.

Rename startup() to run() which sounds more in line what other modules
call their run functions (e.g. Thread.run()).

Signed-Off-By: Sebastian Spaeth <Sebastian@SSpaeth.de>

Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>

offlineimap/version.py

@@ -33,97 +33,3 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA"""
-
-def getcmdhelp():
-    from offlineimap.ui import detector
-    import os
-    uilist = ""
-    for ui in detector.DEFAULT_UI_LIST:
-        uilist += "                " + ui + os.linesep
-    return """
-       offlineimap [ -1 ] [ -P profiledir ] [ -a accountlist ]  [
-       -c configfile  ] [ -d debugtype[,debugtype...]  ] [ -o ] [
-       -u interface ] [ -q ]
-
-       offlineimap -h | --help
-
-       -1     Disable   all  multithreading  operations  and  use
-              solely a single-thread sync.  This effectively sets
-              the maxsyncaccounts and all maxconnections configu-
-              ration file variables to 1.
-
-       -P profiledir
-              Sets OfflineIMAP into profile  mode.   The  program
-              will create profiledir (it must not already exist).
-              As it runs, Python profiling information about each
-              thread  is  logged  into  profiledir.  Please note:
-              This option is present for debugging and  optimiza-
-              tion only, and should NOT be used unless you have a
-              specific reason to do so.   It  will  significantly
-              slow  program  performance, may reduce reliability,
-              and can generate huge amounts of  data.   You  must
-              use the -1 option when you use -P.
-
-
-       -a accountlist
-              Overrides  the accounts section in the config file.
-              Lets you specify a particular  account  or  set  of
-              accounts  to sync without having to edit the config
-              file.   You  might  use  this  to  exclude  certain
-              accounts,  or  to  sync some accounts that you nor-
-              mally prefer not to.
-
-       -c configfile
-              Specifies a configuration file to use  in  lieu  of
-              the default, ~/.offlineimaprc.
-
-       -d debugtype[,debugtype...]
-              Enables  debugging for OfflineIMAP.  This is useful
-              if you are trying to track down  a  malfunction  or
-              figure out what is going on under the hood.  I sug-
-              gest that you use this with -1 in order to make the
-              results more sensible.
-
-              -d  now  requires one or more debugtypes, separated
-              by commas.   These  define  what  exactly  will  be
-              debugged,  and so far include two options: imap and
-              maildir.  The imap option will enable IMAP protocol
-              stream and parsing debugging.  Note that the output
-              may contain passwords, so take care to remove  that
-              from the debugging output before sending it to any-
-              one else.  The maildir option will enable debugging
-              for certain Maildir operations.
-
-       -f foldername[,foldername...]
-              Only sync the specified folders.  The "foldername"s
-              are    the   *untranslated*    foldernames.    This
-              command-line  option  overrides any  "folderfilter"
-              and "folderincludes" options  in the  configuration 
-              file.
-
-       -k [section:]option=value
-              Override configuration file option.  If"section" is
-              omitted, it defaults to "general".  Any underscores
-              "_" in the section name are replaced with spaces:
-              for instance,  to override  option "autorefresh" in
-              the "[Account Personal]" section in the config file
-              one would use "-k Account_Personal:autorefresh=30".
-              
-       -o     Run only once,  ignoring any autorefresh setting in
-              the config file.
-
-       -q     Run  only quick synchronizations.   Ignore any flag
-              updates on IMAP servers.
-
-       -h, --help
-              Show summary of options.
-
-       -u interface
-              Specifies an alternative user interface  module  to
-              use.   This  overrides the default specified in the
-              configuration file.  The UI specified with -u  will
-              be  forced to be used, even if its isuable() method
-              states that it cannot be.   Use  this  option  with
-              care.   The  pre-defined  options, described in the
-              USER INTERFACES section of the man page, are:
-""" + uilist