Made user_limits.test scheduling independant (this solves failure on QNX).

Made sys_var_max_user_conn variable int sized. Changed 
max_user_connections from ulong to uint to be able to use it in 
sys_var_max_user_conn::value_ptr() (solves failures on 64-bit platforms).

into build.mysql.com:/users/tulin/mysql-5.0

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

into mysql.com:/home/jonas/src/mysql-5.0

  when using shm transporter, set sigmask on each thread using pthread_sigmask

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

out-of-sync test and result.

into mysql.com:/home/jimw/my/mysql-4.1-clean

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

into mysql.com:/home/jimw/my/mysql-4.1-clean

into mysql.com:/home/jimw/my/mysql-4.0-clean

into mysql.com:/home/dlenev/src/mysql-5.0-merges

into mysql.com:/home/dlenev/src/mysql-5.0-merges

into mysql.com:/home/dlenev/src/mysql-4.1-merges

into mysql.com:/usr/home/bar/mysql-5.0

  after merge clean-up

into mysql.com:/home/dlenev/src/mysql-5.0-merges

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

The old syntax works as well. WL#2356.

into mysql.com:/home/psergey/mysql-5.0-fix-vg1

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

into gluh.mysql.r18.ru:/home/gluh/MySQL/mysql-5.0

compile warning: changed eq_range -> eq_r

into poseidon.ndb.mysql.com:/home/tomas/mysql-5.0

prefix", which roots were fixed in 4.0 tree.