committing changes in /etc after emerge run

Package changes:

texmf/web2c/texmf.cnf

@@ -4,8 +4,8 @@
 % If you modify this original file, YOUR CHANGES WILL BE LOST when it is
 % updated.  Instead, put your changes -- and only your changes, not an
 % entire copy! -- in ../../texmf.cnf.  That is, if this file is
-% installed in /some/path/to/texlive/2014/texmf-dist/web2c/texmf.cnf,
-% add your custom settings to /some/path/to/texlive/2014/texmf.cnf.
+% installed in /some/path/to/texlive/2015/texmf-dist/web2c/texmf.cnf,
+% add your custom settings to /some/path/to/texlive/2015/texmf.cnf.
 % 
 % What follows is a super-summary of what this .cnf file can
 % contain. Please read the Kpathsea manual for more information.
@@ -225,10 +225,15 @@ TEXINPUTS.platex        = .;$TEXMF/tex/{platex,latex,generic,}//
 TEXINPUTS.eptex         = .;$TEXMF/tex/{ptex,plain,generic,}//
 TEX.pmpost = eptex
 
-% (e)up(La)TeX.
+% p(La)TeX-ng
+TEXINPUTS.ptex-ng   = .;$TEXMF/tex/{uptex,ptex,plain,generic,}//
+TEXINPUTS.platex-ng = .;$TEXMF/tex/{uplatex,platex,latex,generic,}//
+
+% (e)up(La)TeX, and for upmpost
 TEXINPUTS.uplatex = .;$TEXMF/tex/{uplatex,platex,latex,generic,}//
 TEXINPUTS.uptex   = .;$TEXMF/tex/{uptex,ptex,plain,generic,}//
 TEXINPUTS.euptex  = .;$TEXMF/tex/{uptex,ptex,plain,generic}//
+TEX.upmpost = euptex
 
 % pBibTeX bibliographies and style files.
 BIBINPUTS.pbibtex       = .;$TEXMF/{pbibtex,bibtex}/bib//
@@ -544,6 +549,7 @@ shell_escape = p
 % 
 shell_escape_commands = \
 bibtex,bibtex8,\
+extractbb,\
 kpsewhich,\
 makeindex,\
 mpost,\
@@ -630,6 +636,9 @@ file_line_error_style = f
 % Used by makempx to run TeX.  We use "etex" because MetaPost is
 % expecting DVI, and not "tex" because we want first line parsing.
 TEX = etex
+#
+# Use Japanese eptex for Japanese pmpost.
+TEX.pmpost = eptex
 
 % These variables specify the external program called for the
 % interactive `e' option.  %d is replaced by the line number and %s by