Log Message:
Update databases/lmdb to 0.9.16.

Use Github for distfiles. Simplify build/install fixes. Readability.

LMDB 0.9.16 Release (2015/08/14)
- Fix cursor EOF bug (ITS#8190)
- Fix handling of subDB records (ITS#8181)
- Fix mdb_midl_shrink() usage (ITS#8200)

LMDB 0.9.15 Release (2015/06/19)
- Fix txn init (ITS#7961,#7987)
- Fix MDB_PREV_DUP (ITS#7955,#7671)
- Fix compact of empty env (ITS#7956)
- Fix mdb_copy file mode
- Fix mdb_env_close() after failed mdb_env_open()
- Fix mdb_rebalance collapsing root (ITS#8062)
- Fix mdb_load with large values (ITS#8066)
- Fix to retry writes on EINTR (ITS#8106)
- Fix mdb_cursor_del on empty DB (ITS#8109)
- Fix MDB_INTEGERDUP key compare (ITS#8117)
- Fix error handling (ITS#7959,#8157,etc.)
- Fix race conditions (ITS#7969,7970)
- Added workaround for fdatasync bug in ext3fs
- Don't use -fPIC for static lib
- Update .gitignore (ITS#7952,#7953)
- Cleanup for "make test" (ITS#7841), "make clean", mtest*.c
- Misc. Android/Windows cleanup
- Fix MDB_APPEND doc
- Fix MDB_MAXKEYSIZE doc (ITS#8156)
- Fix mdb_cursor_put,mdb_cursor_del EACCES description
- Fix mdb_env_sync(MDB_RDONLY env) doc (ITS#8021)
- Clarify MDB_WRITEMAP doc (ITS#8021)
- Clarify mdb_env_open doc
- Clarify mdb_dbi_open doc