Update README.md(cherry picked from commit 3c9572718f9862a930b516859e36b86f5f7d93f3)
Redmine #2675: /bin/bash is not available on all supported plaforms

The test script test/acceptance/08_commands/01_modules/003.cf.script
uses a /bin/bash shebang, and the Bash shell is not available on
stock HP-UX systems among others, preventing the test from running
properly. This commit changes bash to sh to conform with all the
other test scripts.
(cherry picked from commit 371a73a519ba712a1ef276c91a74dce2a0716468)
cannot create documentation for cfengine stdlib with those two misplaced parenthesis
(cherry picked from commit a32d37b5e2622fc9ff1e02bb296eece5cfb84349)
Merge remote-tracking branch 'upstream/3.5.x' into 3.5_surfsara