TS-3027: add hashed intermediate certificate support

if ssl_ca_name= is configured in ssl_multicert.config
  use that to build the cert chain
else if proxy.config.ssl.CA.cert.filename is configured (along with proxy.config.ssl.CA.cert.path)
  use that file to build the chain
else if proxy.config.ssl.CA.cert.path is configured (and proxy.config.ssl.CA.cert.filename is NULL)
  use the hashed symlinks in that directory to build the chain
else
  error out because we don't have the right configuration to build the chain
Add TS-3027 to CHANGES
Fix amc induced errors in CHANGES.
Clean up spdy debug message
Fix up versions and copyright headers.
TS-3040 Remove some obsolete traffic_shell references / docs / files
TS-3033: generic message initial marshalling

Implement a very simple generic message marshalling API. This is
similar to the existing hand-rolled marshalling, except that there
are fewer data types, and it is all implemented in a single place.

Add MgmtSocket.cc because there's really no benefit to having all
the mgmt socket wrappers inline. Move some more helper API over to
MgmtSocket.
TS-3033: reimplement management API with generic marshalling

This reimplements the management protocol on top of the generic
message marshalling API.
TS-3034: add unanchored regex option

Add unanchored regex option and use it for traffic_line -m so that
filtering record names is easier.
TS-3041: traffic_layout tool

Add a simple traffic_layout tool to show the location of various
installation paths and resources.
TS-3042: fix the static traffic_server build

Rename --enable-static-libts to --enable-static-proxy, since that's
a better description of what it does. Use this option to default
the libtool static library options so that it works correctly.
Update CHANGES
Fix typo in CHANGES
Update CHANGES
TS-3041: Fix missing virtual destructor (make compiler happy).
TS-3041: Fix build link errors.
TS-3033: Build error fixes.
Remove inconventional INTUxx definitions in favor of POSIX
test_marshall: pass the right sockaddr length to bind(2)
build: globally enable __STDC_LIMIT_MACROS and __STDC_FORMAT_MACROS