Tidy up runit service scripts (#479)

* Fix the script installation path (install everything only on /etc/sv/ly)

* Update the runit scripts to get the TTY value from the /etc/ly/config.ini file

* Update readme.md

res/ly-runit-service/conf

@@ -8,7 +8,5 @@ fi
 BAUD_RATE=38400
 TERM_NAME=linux
 
-StandardInput=tty
-TTYPath=/dev/tty2
-TTYReset=yes
-TTYVHangup=yes
+auxtty=$(/bin/cat /etc/ly/config.ini 2>/dev/null 1| /bin/sed -n 's/\(^[[:space:]]*tty[[:space:]]*=[[:space:]]*\)\([[:digit:]][[:digit:]]*\)\(.*\)/\2/p')
+TTY=tty${auxtty:-2}

res/ly-runit-service/finish

@@ -1,3 +1,4 @@
 #!/bin/sh
-tty=${PWD##*-}
-exec utmpset -w $tty
+[ -r conf ] && . ./conf
+
+exec utmpset -w ${TTY}

res/ly-runit-service/run

@@ -1,7 +1,5 @@
 #!/bin/sh
 
-tty=${PWD##*-}
-
 [ -r conf ] && . ./conf
 
 if [ -x /sbin/getty -o -x /bin/getty ]; then
@@ -12,4 +10,4 @@ elif [ -x /sbin/agetty -o -x /bin/agetty ]; then
 	GETTY=agetty
 fi
 
-exec setsid ${GETTY} ${GETTY_ARGS} -nl /usr/bin/ly tty2 "${BAUD_RATE}" "${TERM_NAME}"
+exec setsid ${GETTY} ${GETTY_ARGS} -nl /usr/bin/ly "${TTY}" "${BAUD_RATE}" "${TERM_NAME}"