gnu: Add javacc.

* gnu/packages/java.scm (javacc): New variable.

gnu: Add java-snappy-1.

* gnu/packages/compression.scm (java-snappy-1): New variable.

gnu: librecad: Ensure that icons are found at runtime.

* gnu/packages/engineering.scm (librecad)[arguments]: Add phase
"wrap-executable".

gnu: r-rhdf5: Fix build phase.

* gnu/packages/bioinformatics.scm (r-rhdf5)[arguments]: Fix "unpack-smallhdf5"
phase.

gnu: shotwell: Update to 0.27.1.

* gnu/packages/gnome.scm (shotwell): Update to 0.27.1.

Update e-mail for ng0.

* .mailmap: Update entries for ng0.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: fish-guix: Use new URL.

* gnu/packages/shells.scm (fish-guix)[source]: Use new URL.
(home-page): Use new URL.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: python-pycanberra: Switch to new download URL.

* gnu/packages/libcanberra.scm (python-pycanberra)[source]: Use new URL.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: crawl: Update to 0.20.1.

* gnu/packages/games.scm (crawl): Update to 0.20.1.
(crawl-tiles): Update to 0.20.1.
[native-inputs]: Add pngcrush.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: openntpd: Update to 6.2p3.

* gnu/packages/ntp.scm (openntpd): Update to 6.2p3.

gnu: exim: Fix CVE-2017-16943.

* gnu/packages/patches/exim-CVE-2017-16943.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/mail.scm (exim)[source]: Use it.

gnu: image: Rename pngcrunch to pngcrush and update it.

* gnu/packages/image.scm (pngcrush): Renamed from pngcrunch.
[version]: update to 1.8.13.
[arguments]: Use the nolib Makefile.
[origin]: Use the no-lib tar.
[home-page]: update to the new website.
(pngcrunch): New deprecation variable.

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

list-runtime-roots: Ignore ESRCH while reading from /proc.

Fixes <https://bugs.gnu.org/29368>.
Reported by Martin Castillo <castilma@uni-bremen.de>.

* nix/scripts/list-runtime-roots.in (referenced-files): Ignore ESRCH.

tests: messaging: Enable Prosody DIGEST-MD5 auth mechanism.

GNU Freetalk doesn't support SCRAM-SHA-1.

* gnu/tests/messaging.scm (%test-prosody): Override default
disable-sasl-mechanisms value.

services: prosody: Add support for disable-sasl-mechanisms.

* doc/guix.texi (Messaging Services): Update accordingly.
* gnu/services/messaging.scm (prosody-configuration)[disable-sasl-mechanisms]:
New field.

services: prosody: Allow to add raw content to the config file.

* doc/guix.texi (Messaging Services): Update accordingly.
* gnu/services/messaging.scm (prosody-configuration)[raw-content]: New field.
(raw-content?, serialize-raw-content): New procedures.

services: prosody: Add support for http-max-content-size.

* doc/guix.texi (Messaging Services): Update accordingly.
* gnu/services/messaging.scm (prosody-configuration)[http-max-content-size]:
New field.

services: prosody: Add support for http-external-url.

* doc/guix.texi (Messaging Services): Update accordingly.
* gnu/services/messaging.scm (prosody-configuration)[http-external-url]: New
field.

services: prosody: Adapt to Prosody 0.10.0.

* doc/guix.texi (Messaging Services): Add "mam" as a module example.  Document
'prosodyctl check'.  Replace 'prosodyctl cert request' with 'prosodyctl cert
import'.  Regenerate it.
* gnu/services/messaging.scm (serialize-module-list): Remove "posix" from the
default modules list because it is now automatically loaded.
(ssl-configuration)[key, certificate]: Remove them because they are now
automatically located.  Fix their docstrings.
(%default-modules-enabled): Add "carbons" and "blocklist".
(prosody-configuration)[certificates]: Set default directory from which
certificates/keys will be automatically located.

gnu: prosody: Add lua5.1-bitop to inputs.

It is required for mod_websocket on Lua 5.1 since Prosody 0.10.

* gnu/packages/messaging.scm (prosody)[inputs]: Add lua5.1-bitop.