Fix a few "bad example" problems in the rc.d scripts that have been
propogated by copy and paste.
1. Primarily the "empty variable" default assignment, which is mostly
${name}_flags="", but fix a few others as well.
2. Where they are not already documented, add the existence of the _flags
(or other deleted empties) option to the comments, and in some cases add
comments from scratch.
3. Replace things that look like:
prefix=%%PREFIX%%
command=${prefix}/sbin/foo
to just use %%PREFIX%%. In many cases the $prefix variable is only used
once, and in some cases it is not used at all.
4. In a few cases remove ${name}_flags from command_args
5. Remove a long-stale comment about putting the port's rc.d script in
/etc/rc.d (which is no longer necessary).
No PORTREVISION bumps because all of these changes are noops.
Use new style of startup script install
Use dirrmtry when remove some directories
Respect DOCSDIR in pkg-plist
(with small mod from me)
PR: 116776
Submitted by: Alexander Logvinov <ports@logvinov.com>