gnu: bigloo: Update tarball's hash.

* gnu/packages/scheme.scm (bigloo): Change hash.  The tarball was
  recently modified in-place (!).

store: Don't expect build logs to be UTF-8-encoded.

* guix/store.scm (read-latin1-string): New procedure.
  (process-stderr): Use it instead of `read-string'.
  Reported by Andreas Enge <andreas@enge.fr>.

gnu: vorbis-tools: Enable ogg123.

* gnu/packages/oggvorbis.scm (vorbis-tools): Add inputs ao and curl.

gnu: Add libao.

* gnu/packages/oggvorbis.scm (ao): New variable.

gnu: Add curl.

* gnu/packages/curl.scm: New file.
* Makefile.am (MODULES): Add it.

gnu: Add openssh.

* gnu/packages/ssh.cm (openssh): New variable.

.dir-locals.el: Fill at 78 columns.

derivations: Memoize `read-derivation'.

* guix/derivations.scm (read-derivation): Rename to...
  (%read-derivation): ... this.
  (read-derivation): New procedure.
  This reduces the execution of "guix-build gdb" from 2.5s to 1.7s.

store: Slightly improve memoization hashing.

* guix/store.scm (open-connection): Call `make-hash-table' with 100.
  (add-text-to-store): Move TEXT first in ARGS, for better `hash'
  results.
  (add-to-store): Likewise, move ST first.

store: Remove the `fixed?' parameter from `add-to-store'.

* guix/store.scm (add-to-store): Remove the `fixed?' parameter from the
  public interface.
* gnu/packages/bootstrap.scm, guix-download.in, guix/derivations.scm,
  guix/packages.scm, tests/derivations.scm: Update all callers
  accordingly.

store: Avoid use of `set!'.

* guix/store.scm (operation): New macro.
  (define-operation): Define in terms of `operation'.
  (add-text-to-store): Define using `operation', and remove now
  unnecessary `set!'.
  (add-to-store): Likewise.
  (add-text-to-store/cached, add-to-store/cached): Remove.

store: Micro-optimize `write-string'.

* guix/store.scm (write-string): Optimize to write the length, contents,
  and padding all at once.  This yields a 2% improvement on the
  execution time of "guix-build gdb".

Gracefully handle failure to install the current locale.

* guix/ui.scm (install-locale): New procedure.
* guix-build.in, guix-download.in, guix-gc.in, guix-import.in,
  guix-package.in: Use it instead of (setlocale LC_ALL "").

store: Cache `add-text-to-store' results.

* guix/store.scm (<nix-server>)[atts-cache]: New field.
  (add-text-to-store/cached): New procedure.  Use it as a wrapper around
  `add-text-to-store'.
  When running "guix-build gdb", this reduces the number of RPCs from
  3048 to 289, and execution time from 4.7s to 2.6s.

store: Make the `add-to-store' cache per-connection.

* guix/store.scm (<nix-server>)[ats-cache]: New field.
  (open-connection): Update accordingly.
  (add-to-store/cached): Use (nix-server-add-to-store-cache SERVER)
  instead of a weak hash table.

gnu: Add libssh2.

* gnu/packages/ssh.scm: New file.
* Makefile.am (MODULES): Add it.

gnu: Add openldap.

* gnu/packages/openldap.scm: New file.
* Makefile.am (MODULE): Add it.

store: Make `add-to-store' memoizing.

* guix/store.scm (add-to-store/cached): New variable.
  Use it as the new `add-to-store'.
  This reduces the number of RPCs when doing "guix-build gdb" from 5009
  to 3053, and the execution time from 7s to 3.9s.

gnu: gdb: Update to 7.5.1.

* gnu/packages/gdb.scm (gdb): Update to 7.5.1.

build: Require Automake 1.12 or later.

* configure.ac: Require Automake 1.12 or later.