Log Message:
py-uwsgi: update to 2.0.25.1.

2.0.25.1
    Fix build when pcre is not found and is optional (umut)

2.0.25
    Update glusterfs io callback function signature for 6.0 (Ralf Ertzinger)
    Fix default values in help for min-worker-lifetime & \ 
legion-skew-tolerance (Thomas Riccardi)
    Fix build regression with gcc < 5 (Riccardo Magliocchetti)
    Add support for building against prcre2. This changes the regexp internal \ 
data structures (Alexandre Rossi)
    Allow the valgrind generator script to run with a different python version \ 
(Wynn Wilkes)
    Fix a potential error with not releasing the gil in uwsgi_python_rpc (Wynn \ 
Wilkes)
    Rework threading cancellation handling. This can fix issues with threading, \ 
missing atexit callbacks and whatnot. (Inada Naoki)