gnu: bdb: Disallow references to "doc" output.

* gnu/packages/databases.scm (bdb)[arguments]: Add #:disallowed-references.

gnu: wrap-python3: Create more symlinks.

Suggested by Hartmut Goebel <h.goebel@crazy-compilers.com>.

* gnu/packages/python.scm (wrap-python3): Add symlinks for 'pip' and
'python-config'.

gnu: procps: Make procps build on non Linux systems.

* gnu/packages/patches/procps-non-linux.patch.patch: New patch.
* gnu/packages/linux.scm (procps)[source]: Use it.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu: guile: Do not build static libraries.

* gnu/packages/guile.scm (guile-2.0)[arguments]: Add #:configure-flags.

gnu: openssl: Add "doc" output.

* gnu/packages/tls.scm (openssl)[outputs]: Add "doc".
[arguments]: Add 'move-man3-pages' phase.

gnu: openssl: Move static libraries to "static" output.

* gnu/packages/tls.scm (openssl)[outputs]: New field.
[arguments]: Add 'move-static-libraries' phase.

gnu: openssl: Disallow references to Perl.

* gnu/packages/tls.scm (openssl)[arguments]: Add #:disallowed-references.

gnu: qpdf: Remove run-time dependency on Perl.

* gnu/packages/pdf.scm (qpdf)[source](snippet): New field.
[arguments]: Add #:disallowed-references.
[inputs]: Move PERL to...
[native-inputs]: ... here.

gnu: pcre: Add "bin" output.

* gnu/packages/pcre.scm (pcre)[outputs]: Add "bin".

gnu: libxslt: Make generated documentation reproducible.

* gnu/packages/patches/libxslt-generated-ids.patch: New file.
* gnu/packages/patches/libxslt-remove-date-timestamps.patch: Likewise.
* gnu/packages/xml.scm (libxslt)[source]: Use them.
* gnu/local.mk (dist_patch_DATA): Add them.

Merge branch 'master' into core-updates

gnu: Add r-xnomial.

* gnu/packages/statistics.scm (r-xnomial): New variable.

gnu: ruby-hashery: Update to 2.1.2.

* gnu/packages/ruby.scm (ruby-hashery): Update to 2.1.2.
[arguments]: Remove test workaround.

syscalls: Add 'tcgetattr' and 'tcsetattr' bindings.

* guix/build/syscalls.scm (bits->symbols-body, define-bits)
(local-flags): New macros.
(TCSANOW, TCSADRAIN, TCSAFLUSH): New variables.
(<termios>): New record type.
(%termios): New C structure.
(tcgetattr, tcsetattr): New procedures.
* tests/syscalls.scm ("tcgetattr ENOTTY", "tcgetattr")
("tcsetattr"): New tests.

syscalls: Implement arrays in 'define-c-struct' and use it.

* guix/build/syscalls.scm (sizeof*, alignof*, write-type, read-type):
Add support for (array ...) forms.
* guix/build/syscalls.scm (<file-system>)[spare0, spare1]: Remove.
[spare]: New field.
* guix/build/syscalls.scm (%statfs)[identifier]: Change to (array int 2).
[spare0, spare1]: Remove.
[spare]: New field.

gnu: asymptote: Update to 2.37.

* gnu/packages/plotutils.scm (asymptote): Update to 2.37.
* gnu/packages/patches/asymptote-gsl2.patch: Remove file.
* gnu/local.mk (dist_patch_DATA): Remove reference.

gnu: Add python2-shedskin.

* gnu/packages/python.scm (python2-shedskin): New variable.

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

gnu: guitarix: Update to 0.35.0.

* gnu/packages/audio.scm (guitarix): Update to 0.35.0.

gnu: qtractor: Update to 0.7.7.

* gnu/packages/music.scm (qtractor): Update to 0.7.7.

gnu: Add antiword.

* gnu/packages/textutils.scm (antiword): New variable.