Allow either MySQLdb and PyMySQL and add -s/--socket option#1

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jhriggs wants to merge 3 commits intosysown:masterfrom

jhriggs:pymysql-socket

Commits on Apr 29, 2020

Allow either MySQLdb or PyMySQL and add -s/--socket option
jhriggs
committed
Move get_params() call from onStart() to __init__() so that argparse can output help and errors
jhriggs
committed
Use autopep8 and make flake8 happy
jhriggs
committed