Avoid spewing giant debug backtrace into exception in certain OStatus subscription failure cases.
Avoid spewing giant debug backtrace into exception in certain OStatus subscription failure cases.

The code pattern 'new XXXException($e)' to chain exceptions doesn't actually work as intended, as exceptions are actually expecting a string message here.
This caused an implicit string conversion from HTTP_Request2_Exception, which is a PEAR_Exception, which defines an absurdly detailed __toString() method including a giant HTML table with a backtrace if you happen to be on a web request.
Simply passing $e->getMessage() instead clears this up, as we'll get the nice short message like 'Couldn't connect to tcp://blahblah:80'

charnimda/lgbtpzn-social,Piratas/tortuga,d3vgru/StatusNet,bankonme/gnu-social,chimo/social,charnimda/lgbtpzn-social,csarven/statusnet,brion/StatusNet,minmb/statusnet,charnimda/lgbtpzn-social,eXcomm/gnu-social,shashi/StatusNet,xebia/statusnet-oauth2,eXcomm/gnu-social,csarven/statusnet,zh/statusnet,foocorp/gnu-social,foocorp/gnu-social,brion/StatusNet,csarven/statusnet,faulteh/gnu-social,eXcomm/gnu-social,faulteh/gnu-social,UngPirat/freesocial,shashi/StatusNet,chimo/social,furtherfield/gnu-social,minmb/statusnet,znarf/statusnet-ladistribution,zcopley/StatusNet,zcopley/StatusNet,xebia/statusnet-oauth2,gnusocial/mainline,zcopley/zcopleys-statusnet-clone,sikevux/bsk-social,gnusocial/mainline,zcopley/StatusNet,bankonme/gnu-social,Piratas/tortuga,chimo/social,studio666/gnu-social,studio666/gnu-social,xebia/statusnet-oauth2,zcopley/zcopleys-statusnet-clone,sikevux/bsk-social,Piratas/tortuga,furtherfield/gnu-social,furtherfield/gnu-social,zh/statusnet,zcopley/zcopleys-statusnet-clone,studio666/gnu-social,znarf/statusnet-ladistribution,d3vgru/StatusNet,d3vgru/StatusNet,foocorp/gnu-social,znarf/statusnet-ladistribution,zh/statusnet,brion/StatusNet,charlycoste/StatusNet,gnusocial/mainline,shashi/StatusNet,charlycoste/StatusNet,sikevux/bsk-social,furtherfield/gnu-social,Piratas/tortuga,sikevux/bsk-social,bankonme/gnu-social,minmb/statusnet,charlycoste/StatusNet,csarven/statusnet,faulteh/gnu-social,UngPirat/freesocial,eXcomm/gnu-social,faulteh/gnu-social,bankonme/gnu-social,studio666/gnu-social,gnusocial/mainline,UngPirat/freesocial