Latex - \addsec and headsepline - latex

Question

When I write \addsec{Acronymes}, LaTeX puts it in the Table of Contents and DOES the headsepline section. When I write \addsec*{Acronymes}, LaTeX doesnt put it in the Table of Contents and doesnt write it in the headsepline section. But I want that it doesnt appears in the Table of Contents and does appear in the headsepline.
So how do it?
Thats what I've done for this:
\documentclass[a4paper, 12pt, german, headsepline, footsepline, listtotoc, bibtotoc] {scrartcl}
\bibliographystyle{annotate}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[ansinew]{inputenc}
\usepackage[ngerman]{babel}
\usepackage[babel, german=quotes]{csquotes}
\usepackage[printonlyused]{acronym}
%head and footsepline
\usepackage[headsepline,plainheadsepline]{scrpage2}
\clearscrheadfoot
\pagestyle{scrheadings}
\automark[subsection]{section}
\ihead{my title}
\ohead{\headmark}
\ifoot{my name}
\ofoot{\pagemark}
\usepackage{hyperref}
\hypersetup{
colorlinks,
citecolor=blue,
filecolor=blue,
linkcolor=blue,
urlcolor=blue
}
\begin{document}
\input{include/Abstract}
\newpage
\tableofcontents
\newpage
\listoffigures
\newpage
\listoftables
\newpage
\addsec*{Acronymes}
%\addsec{Acronymes}
\begin{acronym}
\acro{HTTP}{Hypertext Transfer Protocol}
\end{acronym}
\end{document}

Answer 1

You can momentarily remove the functionality of \addcontentsline - the macro in charge of adding elements to the ToC - using
{% \begingroup
\renewcommand{\addcontentsline}[3]{}% Remove functionality of \addcontentsline
\addsec{Acronymes}%
}% \endgroup
Grouping via { and } ensure that the command redefinitions are restored after the group ends.