Log Message:
libgcrypt and openssl are PKG_OPTIONS, with openssl enabled by default.
libgcrypt doesn't get used if openssl is installed. There's no way of disabling
openssl if it's found. Fix infodir using SUBST. Depends on latest version of
ucommon. From ChangeLog:

Changes from 2.1.1 to 2.1.2
- use ucommon cmake macros
- copyright assignment to Cherokees of Idaho
- copyright updates and corrections to bring current

Changes from 2.1.0 to 2.1.1
- fix endianness checks
- cleanup alloc/dealloc
- configure: fix libtoolize warning
- requires ucommon 6.2.2 for endian fixes

Changes from 2.0.9 to 2.1.0
- configure: add option to disable compilation of demos
- OSX: Check for macports glibtoolize.
- modernized cmake
- use standard header for malloc
- uptick of abi version for ucommon

2014-04-14  David Sugar (for 2.0.9)

        Merged fix from Alexandre Lision for initial rtcp seq #