* .version: changed to version 2.5.3

* .version: changed to version 2.5.3
* doc/sdccman.lyx: changed version to 2.5.3,
  documented --codeseg and --constseg and pragma codeseg and constseg,
  documented bit parameters (reentrant) and bit returning
* src/SDCCicode.c (geniCodeReceive): fixed (possible) bug generating
   currFunc->recvSize, but is this ok for all ports?
  (ast2iCode): result of ~ on unsigned char must be cast to int for
   bool to work
* src/SDCCmem.c (allocGlobal, allocLocal): don't put bit returning
  function pointers in bit space
* src/SDCCsymt.c (checkSClass): allow bit returning function pointers,
  (processFuncArgs): call port.reg_parm() with reentrancy info
* src/port.h,
* src/avr/main.c,
* src/ds390/main.c,
* src/hc08/main.c,
* src/pic/main.c,
* src/pic16/main.c,
* src/xa51/main.c,
* src/z80/main.c: port.reg_parm prototype extended with
  "bool reentrant" parameter
* src/mcs51/main.c (_mcs51_regparm): use parameter reentrant instead of
  options.stackAuto for allocating bit register parameters
* src/mcs51/gen.c (genNot): optimized complementing direct bit,
  (genSend): set BitBankUsed if it is,
  (selectRegBank): factored out of genCall for use in genPcall,
  (genCall): removed redundant dtype assignmen, use selectRegBank,
  (genPcall): handle returning in Carry properly, save in F0 if needed,
  (genReceive): handle bit register parameters
* src/mcs51/ralloc.c (updateRegUsage): update BitBankUsed along the way,
  (mcs51_assignRegisters): enable bit registers for all reentrant
   functions and don't set BitBankUsed unconditionally
* src/mcs51/peeph.def (177.d): fixed bug if %2==%3
* support/regression/tests/bitvars.c: enable tests for SDCC_STACK_AUTO
* support/regression/tests/funptrs.c: added tests for BOOL and for return

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3885 4a8a32a2-be11-0410-ad9d-d568d2c75423