Add new stringlist files.

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+.\" Copyright 2007-2008 Roy Marples
+.\" All rights reserved
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd Mar 16, 2008
+.Dt RC_STRLIST 3 SMM
+.Os OpenRC
+.Sh NAME
+.Nm rc_stringlist_add , rc_stringlist_addu , rc_stringlist_delete ,
+.Nm rc_stringlist_free , rc_stringlist_new , rc_stringlist_sort
+.Nd RC string list functions
+.Sh LIBRARY
+Run Command library (librc, -lrc)
+.Sh SYNOPSIS
+.In rc.h
+.Ft "RC_STRINGLIST *" Fn rc_stringlist_new void 
+.Ft "RC_STRING *" Fn rc_stringlist_add "RC_STRINGLIST *list" "const char *item"
+.Ft "RC_STRING *" Fn rc_stringlist_addu "RC_STRINGLIST *list" "const char *item"
+.Ft bool Fn rc_stringlist_delete RC_STRINGLIST "const char *item"
+.Ft void Fn rc_stringlist_free "RC_STRINGLIST *list"
+.Ft void Fn rc_stringlist_sort "RC_STRINGLIST *list"
+.Sh DESCRIPTION
+These functions provide an easy means of manipulating string lists. They are
+basically wrappers around TAILQ macros found in
+.Xr queue 3 .
+.Pp
+.Fn rc_stringlist_new
+creates a new list head to store the list.
+.Pp
+.Fn rc_stringlist_add
+adds a malloced copy of
+.Fa item
+to
+.Fa list .
+It returns a pointer to the new item on success, or NULL on failure and sets
+.Va errno
+accordingly.
+.Fn rc_stringlist_addu
+only works if
+.Fa list
+does not already contain
+.Fa item .
+.Pp
+.Fn rc_stringlist_delete
+removes and frees
+.Fa item
+from
+.Fa list ,
+retuning true on success, otherwise false.
+.Pp
+.Fn rc_stringlist_sort
+sorts the
+.Fa list
+according to C locale.
+.Pp
+.Fn rc_stringlist_free
+frees each item on
+.Fa list
+and the
+.Fa list
+itself.
+.Sh SEE ALSO
+.Xr malloc 3 ,
+.Xr free 3 ,
+.Xr queue 3 ,
+.Xr strcmp 3
+.Sh AUTHORS
+.An "Roy Marples" Aq roy@marples.name