Remove superfluous configurations, add descriptions

buildout.cfg

@@ -18,22 +18,15 @@ eggs = setuptools
 # https://lab.nexedi.com/nexedi/slapos.buildout/merge_requests/11
 scripts = dummy
 
-# Uguu, upstream buildout.cfg must be patched as it works the other way
-# around from a packager point of view at least, thus at the end static
-# path, such as Python HOME directory, are wrong...
-#
-# Currently:
-# ./configure --prefix=BUILD_DIRECTORY && make install
-# Instead of:
-# ./configure --prefix=INSTALL_DIRECTORY && make install DESTDIR=BUILD_DIRECTORY
+# Build python with default parameters, disables the default target (profile-opt)
+# profile-opt enables profile-specific optimisation for a default target architecture
+# TODO: investigate why profile-opt sometimes causes a segmentation fault
 [python2.7]
-configure-options +=
-  --prefix=/usr/local/opt/re6st/parts/${:_buildout_section_name_}
-make-targets = make all install
-
-[openssl]
-prefix = /usr/local/opt/re6st/parts/${:_buildout_section_name_}
+make-binary = make
+make-targets = install
 
+# Add openssl location to the library path to ensure that
+#openssl is found after rebootstrap rewrites the paths
 [python-cryptography-env]
 LD_LIBRARY_PATH=${openssl:location}/lib:%(LD_LIBRARY_PATH)s