Squashed commit of the following:
apps/system ping and ping6: Fix a backward test.
apps/system/ping6: ping6 logic now builds without error.
apps/system/ping and ping6: Minor clean-up to configuration settings.
apps/system/ping6: Minor clean-up to be able to configure CONFIG_SYSTEM_PING6
apps/nshlib: Remove support for ping6 from NSH.
apps/system/ping6: Add IPPROTO_ICMPv6 ping6. Initial commit is simply a clone of the IPPROTO_ICMP ping logic.
Rename CONFIG_NET_ICMPv6_PING to CONFIG_NET_ICMPv6_SOCKET.
Squashed commit of the following:
apps/system/ping: Fix some timing issues.
apps/system/ping: A few timing related corrections.
apps/nshlib: Remove support for the NSH 'ping' command. The implementation of that command violated the portable POSIX interface and has been replaced with a ping 'built-in' command at apps/system/ping.
apps/system/ping: Add larger payload. Verify content of echoed payload.
apps/system/ping: Various fixes for a clean compile
system/ping: Add new build structure for system ping command.
apps/fsutils/mkfatfs: New user-space fatfs appears to work fine.
apps/fsutils/mkfatfs: Move mkfatfs from the OS to here. Not fully integrated on the intial commit.
nshlib/nsh_parse.c: Avoid truncating the strcmp result into a unsigned char variable.
nshlib/nsh_netcmds.c: Check for valid hostip before using it.
nshlib/nsh_ddcmd.c: Fix resouce leak when 'if=' or 'of=' params are repeated in the command line. For example:
dd if=/dev/null if=/dev/zero of=/dev/null or
dd if=/dev/zero of=/dev/zero of=/dev/null
apps/examples/flowc: Adds the necessary termios controls to enable hardware flow control
apps/examples/flowc: Add a simple test of serial hardware flow control. This commit just defines the frame work. Hardware flow control is not yet enabled.
apps/netutils/netlib: netlib_ipv[4|6]adaptor() will now use the new routing table interfaces if they are available: If the desination IP address does not correspond to the network served by any device, then the address of the router that should get us to the correct sub-net is is determined. Then the network adaptor that can communicate with the that router has the IP address that will returned.
apps/netutils/netlib: Add new utilities netlib_ipv[4|6]router() that can be used to determine the IP address of a router that would be used some some destination IP address that is not locally accessible.
apps/netutils/netlib: Add helpers for reading the routing table: netlib_read_ipv4route() and netlib_read_ipv6route()
