Proposing a PR to fix a few small typos

[timgates42]

Issue Type

[x] Bug (Typo)

Steps to Replicate and Expected Behaviour

• Examine fapws/base.py, fapws/contrib/sessions.py, tests/unittests/mybase.py and observe retreive, however expect to see retrieve.
• Examine fapws/contrib/siforms/widgets.py, fapws/mainloop.c and observe additonal, however expect to see additional.
• Examine fapws/contrib/multipart.py and observe useually, however expect to see usually.
• Examine fapws/contrib/multipart.py and observe strored, however expect to see stored.
• Examine fapws/contrib/multipart.py and observe porovide, however expect to see provide.
• Examine fapws/extra.c and observe procefure, however expect to see procedure.
• Examine fapws/_evwsgi.c and observe fucntion, however expect to see function.
• Examine fapws/contrib/siforms/forms.py and observe medthod, however expect to see method.

Notes

Semi-automated issue generated by
https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

To avoid wasting CI processing resources a branch with the fix has been
prepared but a pull request has not yet been created. A pull request fixing
the issue can be prepared from the link below, feel free to create it or
request @timgates42 create the PR. Alternatively if the fix is undesired please
close the issue with a small comment about the reasoning.

https://github.com/timgates42/fapws3/pull/new/bugfix_typos

Thanks.