* use base to make merging with bmo easier

* Revert "Bug 1497042 - Enclose table names in CREATE queries"

This reverts commit 62d5637a.

* refactor Bugzilla::DB to not subclass DBI

* use DBIx::Connector to manage database connections

* Ensure we always call DBIx::Connector->dbh before any DBI method

The code didn't allow a way of doing this without a lot of work.

So I had to take the following approach:
The 'dbh' attribute is now a method that delegates to DBIx::Connector's dbh
method. Per the docs, ->dbh() "Returns the connection's database handle. It will
use a an existing handle if there is one, if the process has not been forked or
a new thread spawned, and if the database is pingable. Otherwise, it will
instantiate, cache, and return a new handle."

Then there is the matter of the 'handles' on dbh. I've used Package::Stash to
insert proxy methods into the class when it is loaded.

* Bug 1328659 - Add support for utf8=utf8mb4 (switches to dynamic/compressed row format, and changes charset to utf8mb4)

* add deps

* add prepare_cached to the list of delegated methods.

This was added in bug 340160

* improve the migration to compressed/dynamic rows, skip views

* add missing semicolon

* remove pre-utf8mb4 emoji support

* fix small issue

* add debugging fatal error

blame jeff

r=dkl,a=dkl

r=LpSolit a=dkl

Bug 1151290: It is possible to tell if someone made a private comment on a bug even if you are not an 'insider'
r=dkl,a=glob

(fix ordering)

r=glob,a=glob

r=dylan a=glob

r=dkl a=sgreen

r=glob, a=sgreen

r=dkl, a=sgreen

r=dkl a=sgreen

r=dylan, a=glob

r=dylan,a=glob

Bug 653597 - Reports with "Real Name" fields use foo_real_name in the url parameters for linked queries
r=gerv, a=justdave

r=glob, a=justdave

select
r=LpSolit, a=glob

r=glob a=justdave

r=gerv a=justdave

Remove "Unicode non-character 0xfdd0 is illegal for interchange" warnings thrown by Perl 5.10.1 and 5.12, see bug 405011
r=gerv

Bug 405011: Text is cut off when containing Unicode supplementary characters (outside BMP) with MySQL as backend
r=gerv a=justdave

r/a=glob

r=dkl a=sgreen

r=gerv, a=sgreen

r=LpSolit a=glob

r=LpSolit a=justdave

r/a=glob

r=glob, a=glob

r/a=glob

r=LpSolit, a=sgreen

r=LpSolit, a=sgreen

r=LpSolit, a=LpSolit

r=glob, a=LpSolit

Bug 828344: "contains all of the words" no longer looks for all words within the same comment or flag
r=LpSolit, a=LpSolit