change data directly in mysql for some tables

search-replace on tables that don’t contain serialised data can be
changed directly in mysql
check for serialized before running serial safe replace
Single quote table and col names for edge cases
now quotes on table name
Spell count correctly
Formatting and variable names
Add backticks and show which replace is used
Back tick all the things and better debuggin
Safe flag and table output
Use 'Fast Replace' as column name to avoid confusion
Optimizes search-replace command by check if serialized data is present

Uses a regex search to see if serialized data is present in a column and
if not, runs a direct SQL replace rather than a serialized-safe replace
which is much faster. Also adds a safe flag to the search-replace command
which reverts the command to the previous behavior.
security copy of core function
filename tab completion
with Requests
Merge pull request #1263 from szepeviktor/master

security copy of core function get_core_checksums()
Update mailmap
Bumpity bump
trim commas on tables list in wp db export

In running `wp db export --tables=$(wp db tables --url=local.dev/msstable/feta --scope=blog | tr '\n' ',')` the list of tables passed looks like `wp_4_posts,wp_4_comments,wp_4_links,wp_4_options,wp_4_postmeta,wp_4_terms,wp_4_term_taxonomy,wp_4_term_relationships,wp_4_commentmeta,` 

When the list is later explode()d, the trailing comma causes there to be an empty element in the array, and on export an extra table gets included (whatever is first alphabetically).
Merge pull request #1269 from trepmal/patch-2

trim commas on tables list in wp db export
tab completion re-fixed