update getnetworkinfo help with subversion
update getnetworkinfo help with subversion

- add missing subversion field to getnetworkinfo help
- fix style and format errors in help string
- remove unneeded int casts

(cherry picked from commit b5ec5fe0cb0a85cb626167b66fdda3bed8c5ba19)

reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin