Initialize the BeFoR64 library.
This procedure must be called before encoding/decoding anything!
use befor64 call b64_init print "(L1)", is_b64_initialized
subroutine b64_init()
!< Initialize the BeFoR64 library.
!<
!< @note This procedure **must** be called before encoding/decoding anything!
!<
!<```fortran
!< use befor64
!< call b64_init
!< print "(L1)", is_b64_initialized
!<```
!=> T <<<
if (.not.is_initialized) call penf_init
is_b64_initialized = .true.
endsubroutine b64_init