resip/stack: TlsConnection: check if BIO created successfully

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11230 ddefafc4-47db-0310-ae44-fa13212b10f2
repro/doc: fix links in man pages

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11231 ddefafc4-47db-0310-ae44-fa13212b10f2