gnu: graphicsmagick: Update to 1.3.25 [fixes CVE-2016-2317].

* gnu/packages/imagemagick.scm (graphicsmagick): Update to 1.3.25.

gnu: imagemagick: Update to 6.9.5-9.

* gnu/packages/imagemagick.scm (imagemagick): Update to 6.9.5-9.

gnu: man-db: Patch path to iconv.

* gnu/packages/man.scm (man-db)[arguments]: Add phase
  "patch-iconv-path".

Fixes <http://bugs.gnu.org/24373>.

gnu: man-db: Use modify-phases syntax.

* gnu/packages/man.scm (man-db)[arguments]: Use modify-phases syntax.

gnu: Add rpc-daemon service

* gnu/services/nfs.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

gnu: Add 'package-for-guile-2.2' procedure and use it.

* gnu/packages/guile.scm (guile-2.2-package-name)
(package-for-guile-2.2): New procedures.
* gnu/packages/guile.scm (guile2.2-json, guile2.2-minikanren)
(guile2.2-irregex, guile2.2-commonmark): New variables.

gnu: guile-commonmark: Remove hard-coded "/2.0" in installation directories.

* gnu/packages/guile.scm (guile-commonmark)[source]: Add 'snippet' and
'modules'.

gnu: guile-json: Remove hard-coded Guile effective version.

* gnu/packages/guile.scm (guile-json)[snippet]: Modify 'ac_subst_vars'
in 'configure', and use "@GUILE_EFFECTIVE_VERSION@" instead of "2.0" in
'Makefile.in'.

gnu: guile-minikanren: Remove hard-coded Guile effective version.

* gnu/packages/guile.scm (guile-minikanren)[arguments]: Remove (ice-9
match) from #:modules.  Use 'open-pipe*' to determine the effective
version of Guile, and use that to compute MODULE-DIR.

gnu: guile-irregex: Remove hard-coded Guile effective version.

* gnu/packages/guile.scm (guile-irregex)[arguments]: Add (ice-9 popen)
and (ice-9 rdelim).  Remove nested 'use-modules' form.  Call
'open-pipe*' to determine Guile's effective version, and use it to
compute MODULE-DIR.

gnu: Enable tcp-wrappers for nrircd.

* gnu/packages/messaging.scm (ngircd) [inputs]: Add tcp-wrappers.

gnu: Add tcp-wrappers.

* gnu/packages/networking.scm (tcp-wrappers): New variable.

gnu: Add mpop.

* gnu/packages/mail.scm (mpop): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

services: syslog: Use a PID file.

* gnu/services/base.scm (syslog-service-type)[start]: Remove --no-detach
and use #:pid-file.

gnu: inetutils: Use /var as the localstatedir.

* gnu/packages/admin.scm (inetutils)[arguments]: Add #:configure-flags.

gnu: rottlog: Adjust the default 'weekly' config.

* gnu/packages/admin.scm (rottlog)[arguments]: Add 'tweak-rc-weekly'
phase.

gnu: rottlog: Read configuration files from /etc/rottlog.

* gnu/packages/admin.scm (rottlog)[arguments]: Set
ROTT_ETCDIR=/etc/rottlog in #:configure-flags and add #:make-flags.

gnu: rottlog: Set default value for 'packdir'.

* gnu/packages/admin.scm (rottlog)[arguments]: Add 'set-packdir' phase.

gnu: rottlog: Use 'modify-phases'.

* gnu/packages/admin.scm (rottlog)[arguments]: Use 'modify-phases'.

gnu: Add perl-curses.

* gnu/packages/ncurses.scm (perl-curses): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>