Update to 1.4.1

• Add LICENSE_FILE
• Add NO_ARCH
• Sort USE_PYTHON
• Allow concurrent installation (USE_PYTHON=concurrent)
• Update WWW: SSL certificate has expired in Nov, 2014

Changes: https://bitbucket.org/hpk42/execnet/src/default/CHANGELOG
PR: 218363
Submitted by: sunpoet (myself)
Approved by: koobs (maintainer)