Patch from Scott McKellar:

Patch from Scott McKellar:

-- Adds a new macro buffer_length to return the n_used member of a
  growing buffer.

-- Changed buffer_chomp() to return the character removed instead of
  the new string length.

-- Removed the newly obsolete buffer_append_uescape function.

-- In utils.c: removed a commented-out version of the
  OSRF_BUFFER_ADD_CHAR macro, which has long resided in utils.h.

-- In the OSRF_BUFFER_ADD macro: replaced strcat() with strcpy(), as
  I had done earlier in the corresponding function buffer_add().

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1519 9efc2488-bf62-4759-914b-345cdb29e865