This adds gopher support to WriteFreely -- both single- and multi-user
instances. It is off by default, but can be enabled with the new
`gopher_port` config value in the `[server]` section.

When enabled, multi-user instances will show all public blogs at
gopher://[host]:[gopher_port]/ -- otherwise, blogs are accessible at
gopher://[host]:[gopher_port]/[blog]/

This is just a proof of concept for now. We still need to handle some
edge cases and different configurations, like private instances.

Ref T559

this changed the CLI flag to use the username instead of the userID
leaving the underlying database function as is.

also now posts are all deleted with no option to skip as this is likely
never needed.

CLI only but backend supports calls from app.db.DeleteAccount already

takes --delete-account user_id_number with optional --posts to also
delete posts. if --posts is omitted all user posts will be updated to
anonymous posts

includes cache of latest version and page to view if updates are
available with a link to the latest update's release notes and a link to
check for the latest update now, refreshing the cache manually.

Ref T681

This adds a Sign Up link to site navigation and shows the
otherwise-landing page on /signup when in chorus mode.

Ref T681

Ref T681

instead of App

Ref T675

instead of linking to posts only on a user's blog.

Ref T681

This adds a new config value: `chorus` that signifies an instance is
more about the Reader view than individual blogs / writers. When
enabled, user navigation will show on all pages, including About,
Reader, and Privacy (ref T680).

It also uses different collection templates that keep the instance-wide
navigation at the top of the page, instead of the author's name --
again, branded more for the collective than the individual.

Ref T681

This shows the Blogs page instead of the Editor to logged in users on
the `/` path when the new `simple_nav` config option is enabled.

Ref T680

This adds a new ReqLog() func to the Apper interface that'll return the
log message for incoming requests.

Ref T649

This adds a new `default_visibility` config value that lets an instance
admin set the visibility of newly created collections.

Ref T675

This fixes certificate validation, while keeping HTTP -> HTTPS
redirection.

Ref T542

Previously, this would pass in the instance's full (and invalid) URL.
Now it passes only the host name.

Ref T542

This adds a new config option in the `[server]` section: `autocert`.
When true, WF will automatically generate certificates instead of using
ones from the provided cert path. However, all generated certificates
will be stored in the configured `tls_cert_path`.

Ref T542

instead of *App

instead of *App

This makes the naming scheme more consistent with other funcs.

Ref T565

This enables admins to customize their landing / home page via the Admin
dashboard -- including the text at the top of the page and the section
below it. It keeps the current default text, falling back to it if the
user hasn't overwritten it.

Ref T565

This supports admins previewing changes to the landing page.

Ref T565

Previously, this would only run when configuring an instance for
single-user usage. Now it'll also run when configuring for multi-user
usage.

It also adds a log when the database has already been initialized.

Use the split argument list (slice) just for validation purposes
as it's substantially easier to do `.contains` in a string instead
of a slice. As such, pass the `configSections` arguments to
`Configure()` and check the existence of each one before showing
the options to the user.

An empty argument list is replaced by "server db app" so everything
is there negating the need to check anything else in `Configure()`.
In the same vein the default is "server db app".

The parsing is done in `app.go` alongside the other flags instead
of `main.go` as described in T657.

Add --sections flag to app.go according to T657, parse them
into a string array (check for invalid arguments and abort)
and pass them to Configure(). For now Configure() doesn't do
anything with them yet.

Previously, this would only run when configuring an instance for
single-user usage. Now it'll also run when configuring for multi-user
usage.

It also adds a log when the database has already been initialized.

Ref T576

This moves `hostName` to the `Collection` struct, where it's needed. The
field is populated after successful `GetCollection...()` calls.

This isn't the cleanest way to do things, but it accomplishes the goal.
Eventually, we should accept the AppCfg to `GetCollection...()` calls,
or make them `App` methods, instead of `datastore` methods.

Ref T613

- Adds a new interface, Apper, that enables loading and persisting
  instance-level data in new ways
- Converts some initialization funcs to methods
- Exports funcs and methods needed for intialization
- In general, moves a ton of stuff around

Overall, this should maintain all existing functionality, but with the
ability to now better manage a WF instance.

Ref T613

This ensures the writefreely pkg can be used in other applications that
need to load mysql themselves -- this can be done by building with the
tag: wflib

Ref T613

Ref T613

This adds a new `landing` value in the [app] section of config.ini.
If non-empty, unauthenticated users on multi-user instances will be
redirected to the path given there.

This closes T574

This adds a new `landing` value in the [app] section of config.ini.
If non-empty, unauthenticated users on multi-user instances will be
redirected to the path given there.

This closes T574

Now the func takes a username and password instead of a single string.