doc: fix back-references and stale claims left by the conversion

Reference sections kept pointing at the line-based format they no longer
document.  `sysv` and `task` sent the reader to Services for "<COND>",
the cgroups chapter opened by listing three legacy directives and then
explained further down that only two of them exist here, and the logging
chapter still gave "log:prio:facility.level,tag:ident" as the full
syntax.

Some claims were wrong independent of the format:

  - a sysv is a supervised daemon, grouped with service in
    SVC_TYPE_DAEMON, not a variation on task
  - restart-max has no upper bound of 255, or any other
  - the built-in rescue fallback runs in 12345789, not 12345
  - conditional loading quotes system/10-hotplug.conf, not
    system/hotplug.conf
  - the key spells conflicts, not conflict
  - the built-in getty no longer wants TERM last, it is a key

`if` takes either a service name or, in angle brackets, a condition,
decided in svc_ifthen().  Only the examples showed this, so it is now
said.

Terminology follows the split index.md already draws: a block is the new
format, a stanza the line-based one.

src/rescue.conf was still line-based, missed because it sits in src/
rather than system/ or contrib/.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

doc/config/files.md

@@ -70,12 +70,12 @@ unique group, where files within each group are sorted alphabetically.
     /etc/finit.d/enabled/1-aaa.conf
     /etc/finit.d/enabled/1-abc.conf
 
-The resulting combined configuration is read line by line, each `run`,
+The resulting combined configuration is read in order, each `run`,
 `task`, and `service` added to an ordered list that ensures they are
 started in the same order.  This is important because of the blocking
-properties of the `run` statement.  For an example on the relation of
-`service` and `run` statements, and dependency handling between them,
-see [Conditional Loading](services.md#conditional-loading), below.
+properties of `run`.  For an example on the relation of `service` and
+`run`, and dependency handling between them, see
+[Conditional Loading](services.md#conditional-loading), below.
 
 > [!NOTE]
 > The names `finit.conf` and `finit.d/` are only defaults.  They can be
@@ -84,7 +84,7 @@ see [Conditional Loading](services.md#conditional-loading), below.
 >
 > They can also be overridden from the [kernel command line](../cmdline.md)
 > using: `-- finit.config=/etc/bar.conf` and in that file use the
-> top-level configuration directive `rcsd /path/to/finit.d`.
+> top-level setting `rcsd = "/path/to/finit.d"`.
 
 Filesystem Layout
 -----------------