sv,runsv,runsvchdir: change the default service directory.

Upstream defaulted to /service as default, we use /var/service. This
patch was inspired by

https://salsa.debian.org/debian/runit/-/blob/77a49befd7c1a08bfe0613454e540562529811fa/debian/patches/0001-default-directory-for-services-on-Debian-is-etc-servi.diff

but the change in sv.c was also performed in the build template for
runit in void-packages.

Author: ericonr

man/runsv.8

@@ -157,9 +157,9 @@ This command is ignored if it is given to
 .IR service /log/supervise/control.
 .P
 Example: to send a TERM signal to the socklog-unix service, either do
-  # sv term /service/socklog-unix
+  # sv term /var/service/socklog-unix
  or
-  # printf t >/service/socklog-unix/supervise/control
+  # printf t >/var/service/socklog-unix/supervise/control
 .P
 .BR printf (1)
 usually blocks if no

man/runsvchdir.8

@@ -27,13 +27,13 @@ with a symlink pointing to
 .IR dir .
 .P
 Normally 
-.I /service
+.I /var/service
 is a symlink to
 .IR current ,
 and
 .BR runsvdir (8)
 is running
-.IR /service/ .
+.IR /var/service/ .
 .SH EXIT CODES
 .B runsvchdir
 prints an error message and exits 111 on error.

man/sv.8

@@ -30,7 +30,7 @@ If
 .I service
 doesn't start with a dot or slash and doesn't end with a slash, it is
 searched in the default services directory
-.IR /service/ ,
+.IR /var/service/ ,
 otherwise relative to the current directory.
 .P
 .I command
@@ -232,7 +232,7 @@ This option implies
 .TP
 .B SVDIR
 The environment variable $SVDIR overrides the default services directory
-.IR /service/ .
+.IR /var/service/ .
 .TP
 .B SVWAIT
 The environment variable $SVWAIT overrides the default 7 seconds to wait

src/sv.c

@@ -32,7 +32,7 @@
 char *progname;
 char *action;
 char *acts;
-char *varservice ="/service/";
+char *varservice ="/var/service/";
 char **service;
 char **servicex;
 unsigned int services;