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/runlevels.md

@@ -38,8 +38,8 @@ Example:
     }
 
 When bootstrap has completed, Finit moves to runlevel 2.  This can be
-changed in `/etc/finit.conf` using the `runlevel N` directive, or by a
-script running in runlevel S that calls, e.g., `initctl runlevel 9`.
+changed in `/etc/finit.conf` with `runlevel = N`, or by a script running
+in runlevel S that calls, e.g., `initctl runlevel 9`.
 The latter is useful if startup scripts detect problems outside of
 Finit's control, e.g., critical services/devices missing or hardware
 problems.
@@ -52,7 +52,7 @@ complete before proceeding to 2.
 Finit first stops everything that is not allowed to run in 2, and then
 brings up networking.  Networking is expected to be available in all
 runlevels except: S, 1 (single user level), 6, and 0.  Networking is
-enabled either by the `network script` directive, or if you have an
+enabled either by `network = "script"`, or if you have an
 `/etc/network/interfaces` file, Finit calls `ifup -a` -- at the very
 least the loopback interface is brought up.
 
@@ -88,7 +88,7 @@ Networking
 
 Script or program to bring up networking, with optional arguments.
 
-Deprecated.  We recommend using dedicated task/run stanzas per runlevel,
+Deprecated.  We recommend using dedicated task/run blocks per runlevel,
 or `/etc/network/interfaces` if you have a system with `ifupdown`, like
 Debian, Ubuntu, Linux Mint, or an embedded BusyBox system.
 
@@ -156,7 +156,7 @@ albeit deprecated.
 
 `rlimit` can be set globally, in `/etc/finit.conf`, or locally per
 each `/etc/finit.d/*.conf` read.  I.e., a set of task/run/service
-stanzas can share the same rlimits if they are in the same .conf.
+blocks can share the same rlimits if they are in the same .conf.
 
 Miscellaneous Settings
 ----------------------