compat/utils: Add copy of python multiprocessing pool for pre 2.7.3 issues

python 2.7 shows hangs with issues in its pool implmenetation. Rather than
try and hack around these, add a copy of the working pool implementation
to the compat module from 2.7.3.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
cooker/utils: Drop custom 'interactive' variables list and store environment in BB_ORIGENV instead

Maintining hardcoded lists of user environmental variables is hacky,
replace these with the savedenv datastore. Allow access to that
through the BB_ORIGENV variable.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
fetch2: Export upper and lower case environment variables

Applications are inconsistent in their use of upper and lower case proxy
variables. Curl, for example, specifies NO_PROXY (not no_proxy) in the
man page (changed in 2009 [1]). Avoid proxy issues by ensuring both the
upper and lower case versions of each proxy variable is available in the
environment for the fetcher commands.

Add FTPS_PROXY and ftps_proxy to the list as well.

1. http://curl.haxx.se/mail/tracker-2009-04/0012.html

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
fetch2: Remove broken git variables from the environment

The following variables perform no function outside of bitbake:

    GIT_CONFIG
    GIT_PROXY_HOST
    GIT_PROXY_PORT
    GIT_PROXY_IGNORE

GIT_CONFIG only affects the git-config command which is not relevant to
the fetcher. This was previously used with the OE GIT_CORE_CONFIG
variable which would provide a basic git config to use instead of the
user's config. This usage was deprecated by git for over a year now:

http://git.661346.n2.nabble.com/Overriding-gitconfig-using-GIT-CONFIG-td6680977.html

GIT_PROXY_HOST and GIT_PROXY_PORT are not used by git.

GIT_PROXY_IGNORE was an OE construct used to create the custom git
config and had no meaning outside of the OE environment. It is not used
by git.

Remove these variables from the fetcher environment.

Users wishing to configure git to work with a proxy should define the
GIT_PROXY_COMMAND environment variable to use an external script.
NO_PROXY can be used within this script to skip the proxy for certain
hosts.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Update version to 1.17.0

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>