* gnu/build/file-systems.scm (MS_REMOUNT): New constant.
  (mount-file-system): Add 'flags' local variable.   When FLAGS has
  MS_BIND & MS_RDONLY, call 'mount' with MS_REMOUNT.
* gnu/services/base.scm (file-system-service) <start>: Likewise.

This works around Guile bug <http://bugs.gnu.org/15540>.
Reported by Andreas Enge <andreas@enge.fr>.

* gnu/packages/engineering.scm: Don't #:select from (gnu packages ...).
* gnu/packages/gcc.scm: Likewise.
* gnu/packages/package-management.scm: Likewise.
* gnu/packages/photo.scm: Likewise.
* gnu/packages/pulseaudio.scm: Likewise.
* gnu/packages/moe.scm: Likewise, and #:select from (guix licenses)
  instead.

* guix/gexp.scm (write-gexp-input, write-gexp-output): New procedures.
  (<gexp-input>, <gexp-output>): Use them as printers.

* guix/profiles.scm (ca-certificate-bundle): Create
  $output/etc/ssl/certs if and only if CA-FILES is non-empty.

* gnu/packages/bioinformatics.scm (sra-tools): New variable.

* gnu/packages/bioinformatics.scm (ncbi-vdb): New variable.

* gnu/packages/bioinformatics.scm (ngs-java): New variable.

* gnu/packages/bioinformatics.scm (ngs-sdk): New variable.

* gnu/packages/bioinformatics.scm (python-biopython, python2-biopython): New
  variables.

* gnu/packages/compression.scm (perl-compress-raw-zlib)[arguments]:
  Add missing quotes, as needed since commit f8503e2b.
* gnu/packages/perl.scm (perl-ipc-run)[arguments]: Likewise.
* gnu/packages/xml.scm (perl-xml-sax)[arguments]: Likewise.

* gnu/packages/webkit.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

* gnu/packages/perl.scm (perl-json-any): New variable.

* guix/import/cpan.scm (string->license): Remove extraneous "_0"
  suffix for Artistics licenses.

* gnu/packages/package-management.scm (nix)[inputs]: Move
  perl-www-curl, perl-dbi, perl-dbd-sqlite to...
  [propagated-inputs]: ...this new field

* gnu/packages/perl.scm (perl-sys-hostname-long): New variable.

* gnu/packages/perl.scm (perl-text-table): New variable.

* gnu/packages/perl.scm (perl-text-aligner): New variable.

* gnu/packages/perl.scm (perl-set-scalar): New variable.

* gnu/packages/databases.scm (perl-sql-splitstatement): New variable.

* gnu/packages/databases.scm (perl-sql-tokenizer): New variable.

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

* gnu/packages/patches/perl-net-amazon-s3-moose-warning.patch: New patch.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/web.scm (perl-net-amazon-s3): New variable.

* gnu/packages/xml.scm (perl-xml-libxml): New variable.

* gnu/packages/xml.scm (perl-xml-sax): New variable.

* gnu/packages/xml.scm (perl-xml-sax-base): New variable.

* gnu/packages/xml.scm (perl-xml-namespacesupport): New variable.

* gnu/packages/perl.scm (perl-term-progressbar-simple): New variable.

* gnu/packages/perl.scm (perl-term-progressbar-quiet): New variable.

* gnu/packages/perl.scm (perl-test-mockobject): New variable.

* gnu/packages/perl.scm (perl-universal-isa): New variable.

* gnu/packages/perl.scm (perl-universal-can): New variable.

* gnu/packages/perl.scm (perl-term-progressbar): New variable.

* gnu/packages/perl.scm (perl-term-readkey): New variable.

* gnu/packages/perl.scm (perl-class-methodmaker): New variable.

* gnu/packages/perl.scm (perl-io-interactive): New variable.

* gnu/packages/perl.scm (perl-term-encoding): New variable.

* gnu/packages/perl.scm (perl-moosex-types-datetime-morecoercions):
  New variable.

* gnu/packages/perl.scm (perl-time-duration-parse): New variable.

* gnu/packages/perl.scm (perl-time-duration): New variable.

* gnu/packages/perl.scm (perl-test-pod-coverage): New variable.