doxygen2man: Fix function parameter alignment

[chrissie-c]

Also, prevent truncation of parameter descriptions in the
body of the man page due to strtok() usage.

[chrissie-c]

       int32_t qb_hdb_handle_create(
           struct qb_hdb   *hdb,  /* the database instance */
           int32_t          instance_size,            /* size of the object to malloc */
           qb_handle_t     *handle_id_out            /* new handle */
       );

becomes

       int32_t qb_hdb_handle_create(
           struct qb_hdb   *hdb,            /* the database instance */
           int32_t          instance_size,  /* size of the object to malloc */
           qb_handle_t     *handle_id_out   /* new handle */
       );

[fabbione]

Untested but the patch looks good