Move /etc/conf.d/rc to /etc/rc.conf.

Lowercase all configurable variables, non configurations remain uppercase.
Replace rc_env_bool with rc_yesno.
Split localmount info procfs (Linux) and dumpon, savecore (BSD)

sh/Makefile

@@ -1,7 +1,7 @@
-DIR  = $(RC_LIB)/sh
-CONF = functions.sh init-functions.sh init-common-post.sh \
-	   rc-functions.sh rc-mount.sh
-BIN  = gendepends.sh net.sh rc-mount.sh rc-help.sh runscript.sh
+DIR = $(RC_LIB)/sh
+INC = functions.sh init-functions.sh init-common-post.sh \
+	  rc-functions.sh rc-mount.sh
+BIN = gendepends.sh net.sh rc-mount.sh rc-help.sh runscript.sh
 
 TOPDIR = ..
 include $(TOPDIR)/default.mk