Revert "Add --bandwidth-limit option to sxls"

This reverts commit 74a8f106dee7e58f89c30fbc6b1051743220987f.
sxsetup cleanup
sxserver: drop /data subdir from SX_DATA_DIR
http port interface
sxinit --port support
sxadm --port support
hashfs port support
port support in node add (newnode end)