Fix uninitialized warnings causing build failure
Do not activate DEBUG_FLAGS by default
Finish fixing gcc stupidity
Directly use calloc instead of malloc + memset
Correctly use calloc
Add the ability to setup the nameserver via pkg.conf or env

That allows to install in a jail without resolv.conf for example:
NAMESERVER="8.8.8.8" pkg -j myjail install something
Mimic pkg_delete default: if one of the pkg delete args contains * then switch to MATCH_GLOB
Add new pkgdb_access() function to test if process has the right
access levels to continue.  Now takes notice of $INSTALL_AS_USER in
the environment.
Use EPKG_ENOACCESS for consistency with EPKG_ENODB
Add error code for insecure permissions on databases
Rewrite pkgdb_access to actually test what we're interested in:

  * Are the permissions on the DB too lax?

  * Do we have the level of (read,write,create) access we need.

'create' access translates into 'read,write' access on the enclosing
directory.
Instead of testing geteuid() == 0, instead, test what we really mean:
the package database (local.sqlite) has secure permissions, and the
euid of the process as appropriate read / write access (including to
create the DB)
Fix brain-o.  Copy the directory, not what we just tested to be a NULL
pointer.

Tweak error message slightly.
Fixes #414 -- pkgng should be usable as an ordinary user when
INSTALL_AS_USER is set in the environment.

It's insecure if the package DB is owned by another user when root is
doing stuff.

When INSTALL_AS_USER is set, allowed owners of the pkg DB are root or
the euid of the process.  The egid of the process can have write
access.
Fix the build: don't use 'access' as a variable name because that
clashes with access() which ticks off gcc.  Add err.h to rquery.c
because without it use of warnx() ticks off clang...
Say 'yes' or '!yes' not 'yes == true' or 'yes == false'
Consistentify boolean usage
Add periodic scripts converted from pkg_install
Merge pull request #416 from aklv/periodic

Add periodic scripts converted from pkg_install
Sync usage_audit() with manual page.