Use AS_HELP_STRING macro to improve the output of ./configure --help.
Use AS_HELP_STRING macro to improve the output of ./configure --help.

wugh7125/ortp,wugh7125/ortp,dmonakhov/ortp,VTCSecureLLC/ortp,VTCSecureLLC/ortp,Linphone-sync/oRTP,dozeo/ortp,Linphone-sync/oRTP,jiangjianping/ortp,jiangjianping/ortp,Linphone-sync/oRTP,videomedicine/oRTP,dmonakhov/ortp,videomedicine/oRTP,wugh7125/ortp,samueljero/linphone-oRTP,dozeo/ortp,samueljero/linphone-oRTP,jiangjianping/ortp,samueljero/linphone-oRTP,caizw/ortp,caizw/ortp,Distrotech/oRTP,carpikes/ortp,dmonakhov/ortp,videomedicine/oRTP,caizw/ortp,carpikes/ortp,VTCSecureLLC/ortp,dozeo/ortp,Distrotech/oRTP,Distrotech/oRTP,carpikes/ortp