- cleanup optionsmodel before adding new proxy options
- place SOCKS version stuff below proxy port (IP, Port, SOCKS version)
- simplyfy some parts of the code (e.g. don't check IP and port, as this
is done in optionsdialog anyway, remove unneeded {} in switch/case)
- small cosmetic changes in the header for better readability
Add an option -detachdb (and entry in OptionDialog), without which no
lsn_reset is called on addr.dat and blkindex.dat. That means these
files cannot be moved to a new environment, but shutdown can be
significantly faster. The wallet file is always lsn_reset'ed.
-detachdb corresponds to the old behaviour, though it is off by
default now to speed up shutdowns.
