This reverts commit 928ee00d.

This causes further regressions when building libavcodec. So revert this
partial fix for now.

0.9.6 fails to build on (at least) gcc 6.3.0, with:
    [CC] nestegg/halloc/src/halloc.c.o
In file included from nestegg/halloc/src/halloc.c:19:0:
nestegg/halloc/src/align.h:33:25: error: conflicting types for 'max_align_t'
 typedef union max_align max_align_t;
                         ^~~~~~~~~~~
In file included from nestegg/halloc/src/../halloc.h:18:0,
                 from nestegg/halloc/src/halloc.c:18:
/usr/lib/gcc/x86_64-linux-gnu/6/include/stddef.h:429:3: note: previous declaration of 'max_align_t' was here
 } max_align_t;
   ^~~~~~~~~~~
Makefile:104: recipe for target 'nestegg/halloc/src/halloc.c.o' failed

Also, add --disable-static configure option.
Also, reindent configure options.

Will be needed to customise backup restoration.
Also, stop using slapos.cookbook:generic.mysql.wrap_mysqld, which:
- did not allow extra arguments
- did incorrect and superfluous ulimit manipulation

Also, move instance-mariadb-resiliency-after-import-script.sh.in out of its
subdirectory, as it causes problems when passing the "filename" option to
slapos.recipe.build:download recipe.

pin uritemplate to 0.6 because google-api-python-client does not work with with version 3.0 of uritemplate

/cc @kazuhiko @jerome 

/reviewed-on nexedi/slapos!134

The ngx_http_realip_module module is used to change the client address and optional port to the one sent in the specified header fields.

so that the client IP is no longer the frontend IP, so rack
attack won't be blacklisting fontend IPs