core: ensure local transactions aren't discarded as underpriced

This fixes an issue where local transactions are discarded as
underpriced when the pool and queue are full.

vendor: Fix index out of range panic when size is bigger than 1 TiB

travis.yml: remove obsolete brew-cask install

core, eth: fix tracer dirty finalization

Indicate that --light and --fast options are replaced by --syncmode

* cmd/geth, mobile: add memsize to pprof server

This is a temporary change, to be reverted before the next release.

* cmd/geth: fix variable name

Dockerfile: revert the user change PR that broke all APIs

Revert "cmd/puppeth: fix node deploys for updated dockerfile user"

Revert "Dockerfile.alltools: fix invalid command"

DialContext allows users to pass a Context object for cancellation.
Close closes the underlying RPC connection.

* fix typo

* fix typo

* fix typo

This avoids logging accept errors on shutdown and removes
a bit of duplication. It also fixes some goimports lint warnings.