TS-2845: Commit e6b9cb533 causes problems with stats_over_http
Revert "TS-2274 Set diags.show_location to on"

This reverts commit 82401537663e5e57dddfd8d1a98c5ecdbdf39d8a.
Fix docs for Netscape log format. Author: piotr@bulinski.pl

This closes #93
TS-2776: Core dump inside openssl library
TS-2776: Core dump inside openssl library
Changed the version check to runtime and added a debug statement
TS-2870 Update SPDY defaults to better match our other defaults
TS-2868: Error setting HSTS max age with traffic_line
TS-2873 Cleanup SPDY metrics and configs
TS-2872 Can't set "Send Window" for SPDY/3.1 > 64k.

Most of this code is Brian Geffon's fault.
TS-2874 Make some of the SPDY metrics persistent
TS-2875 Change hwloc library env variables from hwloc_ to HWLOC_
Renaming spdy_sm usage to spdy_cs to conform with previous naming changes
Fixing build related to rename of spdy_sm_create
TS-2877: http_load waits until timeout when response body is zero
TS-2236: remove trailing null in response body set by fabricate_with_old_api

I'm seeing this too whenever a remap plugin set an error response
body using TSHttpTxnErrorBodySet.  I think the bug is simply failed
to realise that ink_bvsprintf will return resulting len including
the final null.
Bumped the version number for the 5.1.0 release
Bumped the version of the docs to 5.1 and 5.1.x
TS-2879: Remap errors and redirects should honor keep-alive
TS-2879: Remap errors and redirects should honor keep-alive
Added SPDY support, and some other minor cleanup