Merge lp://staging/~percona-core/percona-toolkit/release-2.1.11 into lp://staging/percona-toolkit/2.1

Changelog (+2/-0)
Makefile.PL (+1/-1)
bin/pt-align (+2/-2)
bin/pt-archiver (+2/-2)
bin/pt-config-diff (+2/-2)
bin/pt-deadlock-logger (+2/-2)
bin/pt-diskstats (+2/-2)
bin/pt-duplicate-key-checker (+2/-2)
bin/pt-fifo-split (+2/-2)
bin/pt-find (+2/-2)
bin/pt-fingerprint (+2/-2)
bin/pt-fk-error-logger (+2/-2)
bin/pt-heartbeat (+2/-2)
bin/pt-index-usage (+2/-2)
bin/pt-ioprofile (+2/-2)
bin/pt-kill (+2/-2)
bin/pt-log-player (+2/-2)
bin/pt-mext (+2/-2)
bin/pt-mysql-summary (+2/-2)
bin/pt-online-schema-change (+2/-2)
bin/pt-pmp (+2/-2)
bin/pt-query-advisor (+2/-2)
bin/pt-query-digest (+2/-2)
bin/pt-show-grants (+2/-2)
bin/pt-sift (+2/-2)
bin/pt-slave-delay (+2/-2)
bin/pt-slave-find (+2/-2)
bin/pt-slave-restart (+2/-2)
bin/pt-stalk (+2/-2)
bin/pt-summary (+2/-2)
bin/pt-table-checksum (+2/-2)
bin/pt-table-sync (+2/-2)
bin/pt-table-usage (+2/-2)
bin/pt-tcp-model (+2/-2)
bin/pt-trend (+2/-2)
bin/pt-upgrade (+2/-2)
bin/pt-variable-advisor (+2/-2)
bin/pt-visual-explain (+2/-2)
config/deb/changelog (+7/-0)
config/sphinx-build/conf.py (+1/-1)
docs/percona-toolkit.pod (+2/-2)
docs/release_notes.rst (+1604/-5)