for bugs 8033, 8065, 8535, 8582

This particular changeset contains style changes per code review suggestions 
and does not contain bug fixes in of itself.

ha_federated.h:
  standardised code style to conform to internals.texi
ha_federated.cc:
  more code standardisation to conform to internals.texi.
  - casts
  - declarations
  - comments
  - 80 char width
  also, append using string1.append(string2) and not 
  string1.append(string2.c_ptr_quick())

into krsna.patg.net:/home/patg/mysql-5.0

into ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-5.0

  Remove the test show status like InnoDB_rows_read; the value on IA64 was 0.01 percent bigger than on x86; maybe some different optimization

code, because a warning was given also.

into mysql.com:/space/pekka/ndb/version/my50

into mysql.com:/space/my/mysql-4.1

into rurik.mysql.com:/home/igor/mysql-5.0

  Perl script to create HP depot packages.

  Manual post-merge

into rurik.mysql.com:/home/igor/mysql-4.1

This changeset/patch is on top of changesets 1.1814 and 1.1846 
(for bugs 8033 and 8065) and now fixes bug 8535.

These changes have been built and tested successfully on build.mysql.com

handler.cc:
  Added hooks for federated_db_init() and federated_db_end(), 
  as done with ha_archive_db does, per suggestion by Ingo in
  code review of patch 1.1846.
ha_federated.h:
  declaration of federated_db_init() and federated_db_end()
ha_federated.cc:
  - Fixed some indentation problems from indent-ex (mainly to do with
    cases where "variablename += value"
  - Added federated_db_init() and federated_db_end(), as done with
    archive, which also handler more elegantly one of the memory leaks
    from bug 8033 where the federated_mutex was not freed
  - Removed extrenous debug messages in parse_url()
  - Fixed bug 8535, caused by NULL being quoted in write_row. This used to
    work (incorrectly) but a recent change was made in the server that 
    exposed this

  Revised the fix for bug #7098.
  Corrected the method Item_string::new_item.
sql_select.cc:
  Revised the fix for bug #7098.
  Aborted the previous modifications.

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

into krsna.patg.net:/home/patg/mysql-5.0

into rurik.mysql.com:/home/igor/dev/mysql-4.1-0

  Added a test case for bug #7098.
sql_select.cc:
  Fixed bug #7098.
  When a string field was substituted for an equal constant
  the collation of the constant was changed by mistake for 
  the binary collation.

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-compile

  Make SQL more readable, substitute hostname at runtime
mysql-test-run.pl:
  Run init scripts with /bin/sh, ignore return code

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-compile

into mysql.com:/Users/kent/mysql/bk/mysql-4.1-perl

into mysql.com:/Users/kent/mysql/bk/mysql-5.0-compile

'ps_1general' and 'fulltext_cache' test cases.

into mysql.com:/home/dellis/bkl/bug-4.1

into mysql.com:/home/cps/mysql/trees/mysql-5.0

Recommited, as I made a typo in the previous patch myself =)

into mysql.com:/Users/kent/mysql/bk/mysql-4.1-perl

into mysql.com:/home/dellis/bkl/bug-5.0

into mysql.com:/home/mysql_src/mysql-5.0-xa

into mysql.com:/home/mysql_src/mysql-5.0-xa