Warnings using the admin check with 2.0.0.rc1

[ajtruckle72]

I had originally put my issue in MantisBT here but it was closed and I was directed to the forum.

So, I recently upgraded from 1.3.3 to 2.0.1rc and all seems to work well. But when I followed the admin check it did say:

PHP
Version of PHP installed is at least 5.3.2
PHP version 5.6.27 is currently installed on this server.
FAIL
SYSTEM WARNING: set_time_limit(): Cannot set max execution time limit due to system policy
Raised in file /customers/e/9/c/publictalksoftware.co.uk/httpd.www/mantisbt-2-0-0/admin/check/index.php on line 58
display_errors php.ini directive is disabled
For security reasons this directive should be disabled on all production and Internet facing servers.
WARN
disk_total_space function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
diskfreespace function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
exec function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
system function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
popen function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
proc_open function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
proc_nice function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
shell_exec function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
passthru function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN
dl function is enabled
This function has been disabled by the disable_functions php.ini directive. MantisBT may not operate correctly with this function disabled.
WARN

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Is this something I need to worry about?