replace deprecated optparse with argparse

following guidelines from:
https://docs.python.org/2/library/argparse.html#upgrading-optparse-code
except, still using option = parse.parse_args() instead of args = ...

- using the following script in folder fdroidserver:
	for i in *.py; do
		sed -i -e 's/optparse/argparse/' \
			-e 's/OptionParser/ArgumentParser/' \
			-e 's/OptionError/ArgumentError/' \
			-e 's/add_option/add_argument/' \
			-e 's/(options, args) = parser/options = parser/' \
			-e 's/options, args = parser/options = parser/' \
			-e 's/Usage: %prog/%(prog)s/' $i;
	done
- use ArgumentParser argument to replace (option, args) = parser.parse()
  call
- use parser.error(msg) instead of raise ArgumentException as suggested
  in https://docs.python.org/2/library/argparse.html#exiting-methods
- in fdroid catch ArgumentError instead of OptionError

fdroidserver/stats.py

@@ -24,7 +24,7 @@ import time
 import traceback
 import glob
 import json
-from optparse import OptionParser
+from argparse import ArgumentParser
 import paramiko
 import socket
 import logging
@@ -50,19 +50,19 @@ def main():
     global options, config
 
     # Parse command line...
-    parser = OptionParser()
-    parser.add_option("-v", "--verbose", action="store_true", default=False,
-                      help="Spew out even more information than normal")
-    parser.add_option("-q", "--quiet", action="store_true", default=False,
-                      help="Restrict output to warnings and errors")
-    parser.add_option("-d", "--download", action="store_true", default=False,
-                      help="Download logs we don't have")
-    parser.add_option("--recalc", action="store_true", default=False,
-                      help="Recalculate aggregate stats - use when changes "
-                      "have been made that would invalidate old cached data.")
-    parser.add_option("--nologs", action="store_true", default=False,
-                      help="Don't do anything logs-related")
-    (options, args) = parser.parse_args()
+    parser = ArgumentParser()
+    parser.add_argument("-v", "--verbose", action="store_true", default=False,
+                        help="Spew out even more information than normal")
+    parser.add_argument("-q", "--quiet", action="store_true", default=False,
+                        help="Restrict output to warnings and errors")
+    parser.add_argument("-d", "--download", action="store_true", default=False,
+                        help="Download logs we don't have")
+    parser.add_argument("--recalc", action="store_true", default=False,
+                        help="Recalculate aggregate stats - use when changes "
+                        "have been made that would invalidate old cached data.")
+    parser.add_argument("--nologs", action="store_true", default=False,
+                        help="Don't do anything logs-related")
+    options = parser.parse_args()
 
     config = common.read_config(options)