sched/semaphore:  Add nxsem_post() which is identical to sem_post() except that it never modifies the errno variable.  Changed all references to sem_post in the OS to nxsem_post().

    sched/semaphore:  Add nxsem_destroy() which is identical to sem_destroy() except that it never modifies the errno variable.  Changed all references to sem_destroy() in the OS to nxsem_destroy().

    libc/semaphore and sched/semaphore:  Add nxsem_getprotocol() and nxsem_setprotocola which are identical to sem_getprotocol() and set_setprotocol() except that they never modifies the errno variable.  Changed all references to sem_setprotocol in the OS to nxsem_setprotocol().  sem_getprotocol() was not used in the OS

    libc/semaphore:  Add nxsem_getvalue() which is identical to sem_getvalue() except that it never modifies the errno variable.  Changed all references to sem_getvalue in the OS to nxsem_getvalue().

    sched/semaphore:  Rename all internal private functions from sem_xyz to nxsem_xyz.  The sem_ prefix is (will be) reserved only for the application semaphore interfaces.

    libc/semaphore:  Add nxsem_init() which is identical to sem_init() except that it never modifies the errno variable.  Changed all references to sem_init in the OS to nxsem_init().

    sched/semaphore:  Rename sem_tickwait() to nxsem_tickwait() so that it is clear this is an internal OS function.

    sched/semaphoate:  Rename sem_reset() to nxsem_reset() so that it is clear this is an internal OS function.

net/: Versions of psock_send() and pock_sendto() should not set errno.  That is taken care of at a higher level in the send()/sendto() implementation as appropriate.

Networking:  Clean up some naming that has bothered me for a long time... There are no interrupts and no interrupt handlers in the network.  There are events and event handler (there used to to be interrupt logic in there years ago but that is long, long gone).

6LoWPAN/PF_IEEE802154:  Created radiodev.h and renamed various structures to provide a better separation between 6LoWPAN and PF_IEEE802154.

commit 2a3ab1652a2c95bcfc8be8380fc7cbdcb6472938
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Sat Aug 19 08:44:31 2017 -0600

    PF_IEEE802154: Finish some missing bind() logic.  Add configs/sim configuration for testing.

commit 59be4b846a6e3bfe82087a888e3fdac9c3c414e5
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 19:30:04 2017 -0600

    PF_IEEE802154:  More renaming to decouple 6LoPAN from radios in general.

commit 69fabb1aea76e54381bdc13de28a3f1441fb42f4
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 19:21:11 2017 -0600

    PF_IEEE802154: Missed a few renamings.

commit ff0af1bb25567720934cc1c2a721ccd92cc35f89
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 17:46:58 2017 -0600

    PF_IEEE802154:  A few bugfixes

commit 01c7c84afd00cf907d280d30cfaf0fb2cf90e02e
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 17:01:31 2017 -0600

    PF_IEEE802154:  A few bugfixes

commit dcef4056d1c1488c93151135f3b7106977faa903
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 16:31:05 2017 -0600

    PF_IEEE802154: Bring in framework for sendto/recvfrom.  Currently just a crude port of functions from net/pkt and do not provide the implemenation needed.

commit 68c5b7b6dd3ab7eb2d0c19890abb38e6561b140e
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 15:18:31 2017 -0600

    Trivial fix to typo in comment

commit fd0af534c089569ccdbd59f13b85453de0a653ad
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 15:07:20 2017 -0600

    PF_IEEE802154: Add device lookup logic; Rename some things that used to be used only by 6LoWPAN but now must be shared with PF_IEEE802154 and need more generic naming.

commit 4fc80a1659f1c699b050775cefc7f6b631b46114
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 13:49:54 2017 -0600

    PF_IEEE802154: Add driver poll logic.

commit d83f71992df8764faa93f9425f1a7602a758f730
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 13:28:59 2017 -0600

    PF_IEEE802154:  Add frame input function.

commit 77561b8c4d5d7be1f8d8eb62cf1a07229afe2048
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 12:46:29 2017 -0600

    PF_IEEE802154: Socket type should be SOCK_DGRAM.  Hook in socket interface.

commit c0f90350282e9905d7f26a1b30f04cc6d6794648
Merge: 8b518abfd0 169c55e5
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 09:36:32 2017 -0600

    Merge remote-tracking branch 'origin/master' into pf_ieee802154

commit 8b518abfd07d492f5148f2c5fdf65604de9822da
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 09:35:39 2017 -0600

    PF_IEEE802154: Add initialization and connection management logic.

commit 98b62620b3cb420041d8ad14204f9410a8aace8c
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Fri Aug 18 07:52:51 2017 -0600

    PF_IEEE802154: Add basic build support and socket interface framework.

Networking:  When sending ICMPv6 advertisements and solicitations, set the NOARP bit so that we don't overwrite the destination MAC address

Networking:  Replace all references to net_ipaddr_t with either in_addr_t on net_ipv6addr_t.  The goal is to support both IPv4 and IPv6 simultaneously.  This requires that the two types be distinct and not conditionally typedef'ed to net_ipaddr_t.

PKT sockets: Change how the IFF_NOARP flag is handled.  This should be set only when data is moved into the buffer and cleared after tested by the ARP logic.  Setting it globally can cause packets to be sent with no valid MAC addresses

NET: emoved all includes of uip.h; added includes of ip.h wherever needed.  Tried to fix problems of the now missing sneak inclusions because uip.h was removed.  There are probably a few of these that were missed.